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Best Selling Genuine Geo Thermostats

  • We Stock the following top leading brands, including Stant
  • Constantly Updated Inventory of Geo Replacement Thermostat Parts

We stock Thermostat parts for most Geo models, including Metro, Prizm, Spectrum, Storm, Tracker.

Stant
1997 Geo Metro Engine Coolant Thermostat 3 Cyl 1.0L Stant - OE Type Thermostat

P311-5C1A504    13848  New

7203180 , 3918235 , 3037745 , 457-180 , 63418778500 , 374-180 , 239-180 , 31978 , V24V2614 , 33428 , 18M , 15321-73015 , 474180 , ET-15-180 , W115 , L33-9373 , 1532173014 , 131-37 , 340-180 , V24-V5953 , 115 , 28-11485 , 13136 , 457180 , 12T62D , L33-9183 , RT371 , 1430694 , 131-36 , 357180 , 374180 , 2095180 , 357-180 , L339373 , 358 , 143-0680 , 2811485 , 239-185 , 15321-73014 , 1532173010 , 13137 , ET41180 , 751180 , ET-41-180 , 751-180 , 15321-73010 , 7203-180 , 7340-180 , 203-180 , V24V5953 , 2095-180 , 1532173015 , 3848 , 96067938 , ET15180 , 1760082860 , 83024 , 1430680 , L339183 , 474-180 , V24-V2614 , RT-371 , 15848 , V24V6322 , V24-V6322 , 7239-180

Qty:
$5.86
Stant Engine Coolant Thermostat
  • ; Temperature 180 Degrees Alternate Temperature
  • OE Type Thermostat
Brand: Stant
Additional Fitment Information:
Vehicle Block Engine CID CC
1997 - Geo Metro L 3 Cyl 1.0L 61 993
Stant
1992 Geo Metro Engine Coolant Thermostat 4 Cyl 1.3L Stant - OE Type Thermostat

P311-25D8DCD    13849  New

83028 , 96060142 , 24577299 , 131-59 , 357-195 , 13193 , V24V5464 , W57-145 , 96055132 , 96062078 , 417535500 , 2120001B00 , 131-98 , 357195 , ET-15-195 , 131-54 , 13198 , 131-58 , 12551472 , ET-41-195 , 9004833011 , 131-32 , 7203-192 , 10112301 , 13182 , ET15195 , 131-120 , 13154 , 145206062 , 374-195 , 1760082850H14 , 131-106 , 24506986 , 457195 , 239-198 , 13148 , 729-190 , 12T4E , 1767050G10 , 13169 , 3037747 , 13153 , 24505924 , 2095192 , 96067125 , L33-9385 , 1430670 , 96060141 , 751-195 , 96051826 , 474195 , V24V5465 , 644-320 , 13159 , 8100789800 , 131120 , 96069300 , 33429 , 131-82 , 24576634 , 751195 , V24V6542 , 203-192 , 83027 , 131106 , 96067126 , 131-42 , 15849 , 13158 , 2095-192 , 96056898 , 24500253 , 3849 , 2095195 , 28-11486 , 729190 , 3229 , 1760085821 , 17600-82850-H17 , 1760082831 , 374195 , 2095-195 , 91171047 , 239-192 , V24V1028 , 131-93 , 10182377 , 8245766340 , ET41195 , 644320 , 7203192 , TX11388D , 474-195 , 1760081860 , 1760085811 , L339385 , 7340-195 , 357 , 96067229 , 13132 , 19M , 3059081 , V24-V6542 , 17670-50G10 , 131-48 , 24504169 , V24-V5465 , 131-30 , 13170 , 644357 , 19182377 , 13130 , 143-0670 , 203-195 , 1760082850H17 , 13174 , 215 , 13142 , 131-69 , W215 , 131-74 , 13168 , V24-V6974 , 1760050G10 , 457-195 , 131-122 , 131-70 , 340-195 , 131-53 , 13849 , 131-68 , 131122 , V24-V1028 , 131-115 , 7239-192 , 10144185 , 31979 , 1430796 , 1760082811 , 131115 , V24V6974 , 10207375 , W57145 , 7203-195 , 19M1 , V24-V5464 , 2811486

Qty:
$5.09
Stant Engine Coolant Thermostat
  • ; Temperature 195 Degrees OE Temperature
  • OE Type Thermostat
Brand: Stant
Additional Fitment Information:
Vehicle Block Engine CID CC
1992 - Geo Metro L 4 Cyl 1.3L 79 1298
Stant
1997 Geo Metro Engine Coolant Thermostat 3 Cyl 1.0L Stant - Superstat ® Thermostat

P311-3172F8A    45849  New

2003-195 , 774195 , 61979 , 774-195 , 531090 , 8245772990 , 33429S

Qty:
$9.38
Stant Engine Coolant Thermostat
  • ; Temperature 195 Degrees OE Temperature
  • Superstat ® Thermostat
Brand: Stant
Additional Fitment Information:
Vehicle Block Engine CID CC
1997 - Geo Metro L 3 Cyl 1.0L 61 993
Stant
1991 Geo Tracker Engine Coolant Thermostat 4 Cyl 1.6L Stant - OE Type Thermostat

P311-50EDED6    13959  New

131-95 , 131-77 , RT1086 , 248-192 , 7333198 , 1760085841 , 33779 , 358-195 , 285 , 201-192JV , F2TZ 8575 A , 32049 , 358195 , 333-198 , F2TZ8575A , 3959 , RT-1086 , ZZL015171 , 13177 , 7333-198 , YU3Z8575BA , 3199 , 13195 , ZZL015171A , 1430774 , YU3Z 8575 BA

Qty:
$6.04
Stant Engine Coolant Thermostat
  • ; Temperature 195 Degrees Alternate Temperature
  • OE Type Thermostat
Brand: Stant
Additional Fitment Information:
Vehicle Block Engine CID CC
1991 - Geo Tracker L 4 Cyl 1.6L 98 1588
Stant
1995 Geo Metro Engine Coolant Thermostat 3 Cyl 1.0L Stant - Superstat ® Thermostat

P311-3172F8A    45849  New

2003-195 , 774195 , 61979 , 774-195 , 531090 , 8245772990 , 33429S

Qty:
$9.38
Stant Engine Coolant Thermostat
  • ; Temperature 195 Degrees Alternate Temperature
  • Superstat ® Thermostat
Brand: Stant
Additional Fitment Information:
Vehicle Block Engine CID CC
1995 - Geo Metro L 3 Cyl 1.0L 61 993
Stant
1990 Geo Metro Engine Coolant Thermostat 3 Cyl 1.0L Stant - OE Type Thermostat

P311-25D8DCD    13849  New

83028 , 96060142 , 24577299 , 131-59 , 357-195 , 13193 , V24V5464 , W57-145 , 96055132 , 96062078 , 417535500 , 2120001B00 , 131-98 , 357195 , ET-15-195 , 131-54 , 13198 , 131-58 , 12551472 , ET-41-195 , 9004833011 , 131-32 , 7203-192 , 10112301 , 13182 , ET15195 , 131-120 , 13154 , 145206062 , 374-195 , 1760082850H14 , 131-106 , 24506986 , 457195 , 239-198 , 13148 , 729-190 , 12T4E , 1767050G10 , 13169 , 3037747 , 13153 , 24505924 , 2095192 , 96067125 , L33-9385 , 1430670 , 96060141 , 751-195 , 96051826 , 474195 , V24V5465 , 644-320 , 13159 , 8100789800 , 131120 , 96069300 , 33429 , 131-82 , 24576634 , 751195 , V24V6542 , 203-192 , 83027 , 131106 , 96067126 , 131-42 , 15849 , 13158 , 2095-192 , 96056898 , 24500253 , 3849 , 2095195 , 28-11486 , 729190 , 3229 , 1760085821 , 17600-82850-H17 , 1760082831 , 374195 , 2095-195 , 91171047 , 239-192 , V24V1028 , 131-93 , 10182377 , 8245766340 , ET41195 , 644320 , 7203192 , TX11388D , 474-195 , 1760081860 , 1760085811 , L339385 , 7340-195 , 357 , 96067229 , 13132 , 19M , 3059081 , V24-V6542 , 17670-50G10 , 131-48 , 24504169 , V24-V5465 , 131-30 , 13170 , 644357 , 19182377 , 13130 , 143-0670 , 203-195 , 1760082850H17 , 13174 , 215 , 13142 , 131-69 , W215 , 131-74 , 13168 , V24-V6974 , 1760050G10 , 457-195 , 131-122 , 131-70 , 340-195 , 131-53 , 13849 , 131-68 , 131122 , V24-V1028 , 131-115 , 7239-192 , 10144185 , 31979 , 1430796 , 1760082811 , 131115 , V24V6974 , 10207375 , W57145 , 7203-195 , 19M1 , V24-V5464 , 2811486

Qty:
$5.09
Stant Engine Coolant Thermostat
  • ; Temperature 195 Degrees Alternate Temperature
  • OE Type Thermostat
Brand: Stant
Additional Fitment Information:
Vehicle Block Engine CID CC
1990 - Geo Metro L 3 Cyl 1.0L 61 993
Stant
1995 Geo Metro Engine Coolant Thermostat 3 Cyl 1.0L Stant - OE Type Thermostat

P311-5C1A504    13848  New

7203180 , 3918235 , 3037745 , 457-180 , 63418778500 , 374-180 , 239-180 , 31978 , V24V2614 , 33428 , 18M , 15321-73015 , 474180 , ET-15-180 , W115 , L33-9373 , 1532173014 , 131-37 , 340-180 , V24-V5953 , 115 , 28-11485 , 13136 , 457180 , 12T62D , L33-9183 , RT371 , 1430694 , 131-36 , 357180 , 374180 , 2095180 , 357-180 , L339373 , 358 , 143-0680 , 2811485 , 239-185 , 15321-73014 , 1532173010 , 13137 , ET41180 , 751180 , ET-41-180 , 751-180 , 15321-73010 , 7203-180 , 7340-180 , 203-180 , V24V5953 , 2095-180 , 1532173015 , 3848 , 96067938 , ET15180 , 1760082860 , 83024 , 1430680 , L339183 , 474-180 , V24-V2614 , RT-371 , 15848 , V24V6322 , V24-V6322 , 7239-180

Qty:
$5.86
Stant Engine Coolant Thermostat
  • ; Temperature 180 Degrees OE Temperature
  • OE Type Thermostat
Brand: Stant
Additional Fitment Information:
Vehicle Block Engine CID CC
1995 - Geo Metro L 3 Cyl 1.0L 61 993
Stant
1991 Geo Storm Engine Coolant Thermostat 4 Cyl 1.6L Stant - Superstat ® Thermostat

P311-4C4D154    45356  New

33006S , 03539588 , 2044-160 , 2000-160 , 60206 , 3000-160 , 530060

Qty:
$8.55
Stant Engine Coolant Thermostat
  • ; Temperature 160 Degrees Alternate Temperature
  • Superstat ® Thermostat
Brand: Stant
Additional Fitment Information:
Vehicle Block Engine CID CC
1991 - Geo Storm L 4 Cyl 1.6L 98 1588
Stant
1993 Geo Storm Engine Coolant Thermostat 4 Cyl 1.6L Stant - Economy Thermostat

P311-2845834    13006  New

15356 , 1160 , E-105-160 , 11654 , L339041 , 2720926 , L33-9151 , 244-160 , L33-9041 , AT105 , L339051 , 31605 , 1-160 , AT 105 , E105160 , L33-9031 , 452387A , L339151 , 3-750 , 7200160 , 400-160 , 3836 , 30006 , 3750 , 1-S , 602184A , 300-160 , 10-S , 39160 , L339031 , 261126 , 7244-160 , 116-54 , 1430131 , 3006 , L33-9051 , 645 , 208335 , 1S , 10S , 3356 , 7200-160 , 26-1126 , 143-0131 , 644310 , 400160 , 300160 , 175681A , 13006 , 188586

Qty:
$3.85
Stant Engine Coolant Thermostat
  • ; Temperature 160 Degrees Alternate Temperature
  • Economy Thermostat
Brand: Stant
Additional Fitment Information:
Vehicle Block Engine CID CC
1993 - Geo Storm L 4 Cyl 1.6L 98 1588
Stant
1992 Geo Storm Engine Coolant Thermostat 4 Cyl 1.6L Stant - Superstat ® Thermostat

P311-0A787FE    45358  New

83501426 , D1TZ8575B , 2465169 , TH5483 , D4PJ 8575 BA , 684194 , 8966483 , 455326C1 , 3749085 , 2120096002 , C5TE8575B , K66915171 , 369320R91 , C5NE 8575 C , 3133698 , 3136267 , G11065 , 3136185 , AT10239T , D2PJ 8575 RA , 3133598 , 4114132 , 3041388 , A 0032032275 , D1FZ8575A , D3JL 8575 A , C8PJ8575A , 21200P7900 , 3156277 , D3JL8575A , GTS111 , 21200V0200 , 2000-180 , 21200H7802 , 3333594 , 3749086 , D5PZ 8575 B , 3156279 , A0002036475 , 1199784 , C2VE 8575 A , D5PZ8575B , D2TE 8575 KA , 3153119 , 3031507 , C2TZ8575A , 205445C , C5AZ 8575 B , 942072171 , 3054228 , 208336 , 3133594 , C3TZ 8575 A , 3041425 , K71015171 , AT22961 , 4131239 , 1366373 , 644331FHT , 3133596 , D2PJ8575RA , 315627 , C3TZ8575A , 3033770 , 313698 , C8PJ 8575 A , 4513524 , 3054129 , C2OE 8575 A , D4PJ8575BA , 3480303 , 3418439 , F1HZ8575B , 1447384M1 , GTS104 , 1BA 8575 B , 369322R91 , 8942072170 , C2UZ8575A , J8126686 , 94171816 , C5AZ8575B , D1FZ8575B , C5NE8575C , 0032032275 , 133727 , 0002036475 , 6OBC85755483 , 3141726 , 74025103 , 4025103 , 3512992 , D1FZ 8575 A , 94239159 , 3156270 , C2OE8575A , 369321R91 , EAF8575B , D2TE 8575 A , RE33705 , A8AZ 8575 B , C7TZ8575A , 3041507 , 8389272 , 8389173 , 4154312 , D2PJ 8575 GA , D2TE8575KA , C2VE8575A , 3152521 , 13358 , 3153120 , C5TZ8575A , 1BA8575B , 3033780 , 3090427 , D2TE8575A , 21200A3005 , 5176503 , 3514173 , 530080 , EBE 8575 B , D1TZ 8575 B , 3000-180 , AT10996T , 28618 , 33008S , 105000106400 , 2044-180 , C2TZ 8575 A , D5UZ 8575 A , F601K303 , 563311 , 3156286 , 8358061 , 133720 , 2129205 , 1338041 , 386525C1 , C2UZ 8575 A , A 0002036475 , 3149694 , 21200P7905 , 21200V0100 , 21200V0201 , C5TE 8575 B , F1JL8575AA , 331FHT , 3156280 , 7324932 , F244K318 , 3156283 , 21200V0700 , 60208 , A0032032275 , C7TZ 8575 A , 2023-180 , 133730 , D1FZ 8575 B , F601K302 , EAF 8575 B , A8AZ8575B , EBE8575B , D2PJ8575GA , G45788 , 21200A3001 , D5UZ8575A , 94336070 , 1853201M1 , 3156267 , 3126290 , C5TZ 8575 A

Qty:
$8.49
Stant Engine Coolant Thermostat
  • ; Temperature 180 Degrees OE Temperature
  • Superstat ® Thermostat
Brand: Stant
Additional Fitment Information:
Vehicle Block Engine CID CC
1992 - Geo Storm L 4 Cyl 1.6L 98 1588
Stant
1990 Geo Storm Engine Coolant Thermostat 4 Cyl 1.6L Stant - Economy Thermostat

P311-5F1A508    13008  New

ET-43-180 , AT105H , 13008 , 26-1128 , 300180 , 3838 , 401-180 , L339053 , E105180 , 30108 , L33-9143 , 270-195 , 2033-180 , ET43180 , 3726 , 1180 , L339043 , 12T1D , 3-751 , 10H , 401180 , 30008 , 94336069 , 1430149 , 143-0107 , L339033 , 169 , 31805 , 7200-180 , AT 105H , 7244-180 , 261128 , 132-66 , 32032275 , 244-180 , 7200180 , 10-H , 3-768 , EX5482 , 1-H , 3768 , 208336 , E-105-180 , 12323752 , 1H , W169 , W170 , L33-9043 , 13266 , 400180 , 39180 , 13126 , 3008 , 1430107 , AT10239 , 400-180 , 32158 , 15358 , L339143 , 200-180BP , L33-9033 , 200-180JV , 83834 , 300-180 , 33508 , 3-726 , 83501426 , 7244180 , 3358 , L33-9053 , 1430685 , 3751 , 645HT , 131-26 , 1-180

Qty:
$5.18
Stant Engine Coolant Thermostat
  • ; Temperature 180 Degrees OE Temperature
  • Economy Thermostat
Brand: Stant
Additional Fitment Information:
Vehicle Block Engine CID CC
1990 - Geo Storm L 4 Cyl 1.6L 98 1588
Stant
1993 Geo Storm Engine Coolant Thermostat 4 Cyl 1.6L Stant - Superstat ® Thermostat

P311-0973D21    45359  New

18003357-C91 , 386525C1 , AJ5715171A , 3192166 , 2000-195 , AT22963 , 3000-195 , 644331XHT , AJ5715171 , J8127383 , 3156283 , 8127383 , 386525-C1 , 8983500360 , 4488422 , XR3Z8575BA , 905594 , 331XHT , 83500360 , 3780112 , AJ57-15-171 , 2044-192 , 2843210 , 530090 , 33009S , 2000-192 , 2023-192 , 944667 , 4488471 , 60209 , 3156298 , 18003357C91 , AT10906 , 3203275 , 8123420 , 3015433

Qty:
$8.30
Stant Engine Coolant Thermostat
  • ; Temperature 195 Degrees Alternate Temperature
  • Superstat ® Thermostat
Brand: Stant
Additional Fitment Information:
Vehicle Block Engine CID CC
1993 - Geo Storm L 4 Cyl 1.6L 98 1588
Stant
1992 Geo Storm Engine Coolant Thermostat 4 Cyl 1.6L Stant - OE Type Thermostat

P311-0FDEF51    13359  New

410772 , 3156797 , 1633 , EOSZ-8575-A , D4PJ 8575 LA , 1313 , W57105 , 5600143 , C7DZ 8575 A , 4121340 , TP335XH , TH16 , C3OZ 8575 A , 7200-192 , RT1084 , E-105-195 , RT-1039 , D2AE8575SA , W117H , 28-10093 , RT-159 , CG9195 , 330XHT , A8AZ8575C , ET20195 , C5DZ 8575 A , 105000106405 , 3092159 , 143-0180 , ZAM-1119 , 305885 , 3418336 , E1SZ8575A , U339323 , 83504378 , C7DZ8575A , D9BZ 8575 A , E8TZ8575B , 644348 , 133739 , 3090967 , 8620-1088 , RT189 , E6DZ8575A , 52001797 , 3418391 , DVFXH , RT1047 , 4063090 , 13123 , D4PZ 8575-A , RT-1032 , 3041408 , GTS113 , E8TZ8575A , 2810093 , 305490 , 2951700 , 21200V0105 , 335XHT , TP-335XH , RT-1043 , E1SZ 8575 A , 261129 , 6512504 , 56-00143 , 109P , WT/1B , V28V6791 , 13770051 , 10202455 , C7DE 8575 A , 8620-2988 , 331-XHT , V28-V4033 , ET1195 , 5492 , 3528974 , 13187 , C9NN8575A , C6AE8575C , RT1030 , 21200-Q9000 , 21200Q9000 , V28V1132 , RT-1052 , 4494469 , V28-V6234 , D9AZ 8575 A , V28V6479 , 1430156 , 3042805 , 131-56 , C2DE 8575 A , 755-195 , D4PJ8575SA , 3156290 , V28-V5443 , 94828126 , 8952001797 , 94028963 , 299P , 3015397 , EOSZ8575A , 10202454 , 1430662 , 3885009 , C7TE 8575 A , 13160 , RT-1034 , 131-67 , 283 , 3004.88 , 3522677 , 12T1E , 03015493 , 317530100 , E2DZ 8575 A , 62112080111 , 28-10091 , RT355 , F88Z8575AA , 146431 , TP330XH , 302387 , 3156299 , 200-195BP , RT9 , 86201088 , 8942072172 , 19195 , T0726662 , V28-V5447 , U33-9323 , 94372762 , E1AZ 8575 A , 435195 , 3004.90 , 356197 , C2DZ 8575 A , E3TZ8575A , 330-195 , 13171 , E43Z8575B , 435-195 , 277209 , 306388 , V28-V1132 , 378-195 , 335195 , DVN1XH , 10X , 335-195 , W57106 , RT1053 , 2100192 , 644335XHT , 3008.92 , 3000.87 , 131-60 , RT-148 , 302392 , RT-1031 , 21200V0206 , ET-1-195 , W183 , RT119 , C9PJ8575C , ET-20-195 , D1PZ 8575 A , 3518335 , 691F8575AA , 3028626 , RX65-195 , 13140 , 3023.92 , C3DZ 8575 A , 4488472 , F6DZ8575AA , BS-195 , C5AE 8575 C , RT-1054 , 3058.85 , 186 , GTS105 , 417537300 , 1430674 , 300090 , C6AE8575A , 4033 188 , D0RY 8575 A , E5PZ8575A , WT/14B , 200-195JV , DVN26XH , RT1061 , 10147886 , 133724 , 456197 , C2DZ8575A , 18003357C91 , GTS106 , RX65195 , 691F 8575 AA , 140631 , DVN-26XH , C7OZ8575A , C7TE8575A , 335-XHT , 143-0115 , 4028085 , 39185 , 4055 195 , C3DZ8575A , V28V6480 , TH13 , 31955 , 183 , 52028 185AC , 300492 , RT-9 , 13267 , RT159 , RT-1053 , V28V5443 , 481005 , XL2Z8575AA , B5AZ8575B , V28V4033 , 277029 , 1430230 , D2AE 8575 SA , 13127 , C5NE 8575 A , 143-0658 , 3023.87 , 4154313 , 1-X , AT10906T , 10207373 , F28Z8575A , 330-XHT , 300085 , 4033188 , 3004.92 , D1PZ8575A , 31029 , 2120896001 , 300892 , RT1054 , W283 , 21200V0705 , WT/19B , RT1161 , C5AE8575C , 200-192 , 13147 , 3156298 , RT-357 , 2550022600 , D9BZ8575A , V28V6234 , 8620-1091 , 378195 , RT1039 , 83500360 , 2100-192 , D0RY8575A , RT1020 , C5DZ8575A , W217H , F5DZ8575AA , 131-71 , E5PZ 8575 A , 7200-195 , B309 , 3015490 , 3028896 , 131-87 , 13161 , V28-V6480 , DVN-1XH , 7200-195JV , RT1021 , 356 , ET-14-195 , W57-106 , 755195 , 4131068 , 7200-192JV , 807974R92 , 3037757 , C7DE8575A , 4387494 , 83501 426AB , C9PJ 8575 C , DVN-28XH , 131-23 , 131-63 , 8983501426 , 644319 , 5251954 , 28-10095 , ET43195 , 3008.85 , C3OZ8575A , V28-V6791 , S650HT3 , 300488 , 30209 , RT357 , 143-0156 , 356-197 , 13173 , 33009 , V28-V6479 , 15562989 , RT-1020 , RT-355 , E43Z 8575 B , 5600804 , C5DE8575A , 13156 , A309 , RT1034 , 13185 , C1UE8575A , F88Z-8575-AA , C2DE8575A , 143-0230 , 300885 , DVN-1X , RT148 , 229PH , 10108666 , ET-13-195 , ET-43-195 , D2PJ8575KA , V28V5447 , D4PZ8575A , 3539588 , 7779200 , V28-V1131 , 13167 , 13162 , 4131240 , DVN1X , 133749 , C9NN 8575 A , 481003 , 1430658 , V28V1131 , 131-85 , 3051139 , D9AZ8575A , C6AE 8575 C , 331XHT , BS-195BP , E3TZ 8575 A , BS195BP , 4063 090 , 2120096001 , F78Z8575AA , XL2Z-8575-AA , E1AZ8575A , TP-330XH , RT-1047 , RT357DP , 644312 , C1UE 8575 A , RT-1030 , 13119 , RT1052 , 4055195 , 2183 , 10190927 , 3012691 , D4PJ8575LA , RT1049 , RT1031 , C7OZ 8575 A , 13155 , 12554977 , 3238509 , 56-00796 , 644-319 , 2810091 , 1X , 3055672 , RT-357-DP , D4PJ 8575 SA , 195P , DV-FXH , RT--1161 , 52028185AC , C6AE 8575 A , 200-192JV , 48-1003 , 83501426AB , 1430180 , E-186-195 , 3015399 , C5DE 8575 A , RT1043 , 5600796 , RT-1021 , 143-0662 , 1254894 , E0SZ 8575 A , 456-197 , W186 , 83059 , 330195 , 10-X , 26-1129 , E2DZ8575A , 644-348 , 131-73 , 807974-R92 , 301195 , 3514180 , RT-119 , RT-189 , 3205798 , 3041390 , 131-27 , ZAM1119 , 3027868 , 3418335 , 300490 , 229P , RT-1061 , D0AE8575C , 48-1005 , ET14195 , 22545290 , RT-1049 , 56-00804 , 3030055 , 13163 , 22538325 , 300087 , RT1032 , D4PJ8575AA , D0AE 8575 C , 4028 085 , 3054.90 , 2810095 , 3063.88 , 3156294 , DV1XH , 10101864 , RT-1084 , E0SZ8575A , B5AZ 8575 B , 200-195 , 131-61 , 301-195 , 131-55 , 3000.85 , 131-40 , 5600200 , DV-1XH , 1430115 , 131-19 , W57-105 , 21200V0205 , 86202988 , 410899 , 131-3 , 131-47 , 1653 , 131-62 , E105195 , 132-69 , 13359 , F78Z-8575-AA , DVN28XH , E6DZ 8575 A , D2PJ 8575 KA , 34402115 , A8AZ 8575 C , 10190925 , 143-0674 , C5NE8575A , 39195 , ET13195 , E186195 , 299PH , 644-312 , 132-67 , 56-00200 , D4PJ 8575 AA , 317534302 , BS195 , 13269 , 3000.90 , 19595 , 3235347 , 86201091

Qty:
$6.04
Stant Engine Coolant Thermostat
  • ; Temperature 195 Degrees Alternate Temperature
  • OE Type Thermostat
Brand: Stant
Additional Fitment Information:
Vehicle Block Engine CID CC
1992 - Geo Storm L 4 Cyl 1.6L 98 1588
Stant
1991 Geo Storm Engine Coolant Thermostat 4 Cyl 1.6L Stant - Economy Thermostat

P311-33D2B69    13009  New

L339055 , 119E , 13127 , XL2Z 8575 AB , 705-185 , F6TZ8575HA , 03015493 , E5TZ 8575 C , 52028446 , F2TZ 8575-A , RT1058 , 39195 , E0TE8575EA , 401-190 , RT-1025 , 7244-192 , 728195 , F6DZ 8575 AA , RT-1105 , 83838 , F88Z8575AA , EOSZ8575A , 4494469 , ZZS115171 , F88Z-8575-AA , E8TZ8575B , RT-1152 , RT1114 , L33-9035 , 31995 , 300195 , RT-1108 , 15359 , 3-727 , 807974C1 , F1CZ8575D , 10-X , 269 , E8TZ 8575 A , RT-1161 , XR3Z8575BA , ZZP115171 , 1-X , XR3Z 8575 BA , RT1105 , ZZM415171 , W269 , 131-27 , 7244-195 , 1338018 , F3TZ8575A , 3359 , ZZM7-15-171 , EOSZ-8575-A , E1BZ 8575 A , XL2Z-8575-AA , 261129 , 401190 , 244-192 , 30109 , E1BZ8575A , F6CZ 8575 A , YF1Z8575BA , 1X , L33-9045 , E6DZ 8575 B , 3752 , 12514334 , 13009 , 30009 , 13140 , D4PZ8575A , 132-67 , XL2Z8575AA , RT-1111 , 650HT , RT-1155 , E6AZ 8575 B , D4PZ 8575 A , E8TZ8575A , RT1067 , RT-1067 , E6AZ8575B , 7200-195 , 644322 , F4PZ 8575 AA , E7ZE8575AA , YF1Z 8575 BA , RT1155 , L339035 , E8TZ 8575 B , F6ZZ 8575 A , 12323753 , 1807974C94 , F4PZ8575AA , 705185 , E6SZ 8575 A , E6SZ8575A , F6CZ8575A , 52028 185AC , E5TZ8575C , 7200195 , 1-195 , E6AZ 8575 A , 3009 , 300-195 , F58Z8575A , F4TZ8575B , 3727 , RT1139 , 1195 , RT-1024 , RT1087 , ZZM715171 , 3-753 , E6AZ8575A , 131-40 , RT1025 , F1CZ-8575-D , 26-1129 , F6DZ8575AA , F4TZ 8575 B , 1807974C93 , F8DZ-8575-AA , D9TZ8575AA , J8127383 , 1807974C92 , RT-1087 , F5DZ 8575 A , F6ZZ8575A , E6DZ8575B , F5DZ8575AA , L339045 , F2SZ 8575 A , 52028185AC , RT-1067A , F3TZ 8575 A , L339155 , F5DZ8575A , 728-195 , 1807974C91 , RT-1107 , RT1108 , RT-1029 , D9TZ 8575 AA , 7244195 , 3224216 , 83504856 , 3-771 , 52028185AB , 400195 , L33-9055 , L33-9155 , 3753 , RT1161 , RT1120 , RT1111 , F2SZ8575A , 3-752 , 1338016 , F2TZ8575A , E-105-195 , XL2Z8575AB , 1807945C1 , 3771 , 33509 , 807974R92 , 32159 , EX5488 , RT-1114 , E7ZE 8575 AA , F58Z 8575 A , 13267 , RT-1120 , F78Z8575AA , 3839 , RT-1058 , F78Z-8575-AA , 400-195 , RT1067A , RT1024 , ZZP1-15-171 , F6TZ 8575 HA , RT1029 , 244-198 , F8DZ8575AA , RT1107 , 644356 , RT1152 , RT-1139 , E0TE 8575 EA , E105195 , 52028185 , 10X

Qty:
$5.55
Stant Engine Coolant Thermostat
  • ; Temperature 195 Degrees Alternate Temperature
  • Economy Thermostat
Brand: Stant
Additional Fitment Information:
Vehicle Block Engine CID CC
1991 - Geo Storm L 4 Cyl 1.6L 98 1588
Stant
1990 Geo Prizm Engine Coolant Thermostat 4 Cyl 1.6L Stant - OE Type Thermostat

P311-3AA2ED5    13758  New

L339113 , 644-360 , 15758 , 3758 , 214-180 , 471-180 , 33708 , 131110 , 131109 , ET-29-180 , 484580 , 94859163 , 2458613 , 86201782 , 2817482 , 1430654 , E3HN8575AA , 675HT , 471180 , 90916-03046 , 7214-180 , 132-49 , 12302516 , 9091603069 , L33-9193 , 13249 , 761-180 , 131-558 , L33-9113 , 131558 , 1661 , L339193 , 2083-180 , AT 156 , 4074182 , ET29180 , 94840251 , 7214-180JV , 143-0654 , 14-180 , 9091603060 , RT-373 , D8NN8575FB , 4074 182 , 2120077A63 , 9091603046 , 8620-1782 , 2120077A60 , 909160304673 , RT373 , 31928 , 131-110 , 2120077A61 , 2120077A00 , 811-170 , 7779754 , 70998113 , RT366 , 644360 , 351 , 371180 , 28-17482 , 7214180 , 811170 , RT-366 , 761180 , 3058 , 7239-180 , DVN-47H , 56-00481 , 90916-03046-73 , 94856516 , 90916-03090 , DVN47H , 83145 , W57-103 , E6HZ8575A , 5600481 , W57103 , 156 , 94844616 , W156 , 2083180 , 214-180JV , 371-180 , 94844416 , 644351 , 14180 , AT156 , 21200-77A60 , 9091603090 , 7239180 , 131-109 , 75039

Qty:
$7.47
Stant Engine Coolant Thermostat
  • ; Temperature 180 Degrees OE Temperature
  • OE Type Thermostat
Brand: Stant
Additional Fitment Information:
Vehicle Block Engine CID CC
1990 - Geo Prizm L 4 Cyl 1.6L - 1587
Stant
1996 Geo Prizm Engine Coolant Thermostat 4 Cyl 1.8L Stant - Superstat ® Thermostat

P311-203F938    45758  New

2014-180 , 9091603109 , 60928 , 541080 , 33708S , 90916-03109

Qty:
$11.51
Stant Engine Coolant Thermostat
  • ; Temperature 180 Degrees OE Temperature
  • Superstat ® Thermostat
Brand: Stant
Additional Fitment Information:
Vehicle Block Engine CID CC
1996 - Geo Prizm L 4 Cyl 1.8L 107 1762

Latest Geo Repair and Thermostat Installation Advice

CarJunky AutoAdvice

96 geo metro. cooling fan don't work.

Showing 4 out of 32 Posts | Show 28 Hidden Posts
Question From Timthecarguy719 on 96 geo metro. cooling fan don't work.

The fan on this 96 metro doesn't come on.
The relay is fine, the fan motor is fine, ECT sensor new, fues fine.
If the unplug the ECT the fan comes rite on.
What could be the problem?
I was told it could be a ECM problem.

Thanks very much.

Response From Hammer Time

If the fan runs when the CTS is unplugged, that proves the PCM has control of the fan and the circuit is working. The fan isn't programmed to come on until 208 degrees so it may just not be hot enough for the fan to come on.

Response From Timthecarguy719

I have a 180 degree thermostat in it.
208 is kinda hot no?
I just thought about buying one of those aftermartket fan thermostat systems from JEGS performance.
You can adjust the temp setting on that too It's like $28 bucks.
I'll probably just do that.

Response From Hammer Time

That's one of the worst ideas I ever heard.
The car engineered to run at those temps and you're going to totally screw up the fuel mixture. The car is supposed to have a 195 T-stat and the fan isn't supposed to come on until 208. That's nothing. Some of the other GMs are 227 and higher. Stop screwing with what isn't broken.

Response From Timthecarguy719 Top Rated Answer

The car from the factory came with a 195 degree thermostat.
I like my cars to run as cool as they can.
the fricken car over heated and i had to rebuild the topend because of it not working. Rite now i just have it hard wired to a switch for now.

Response From Hammer Time

That car is engineered to run between 195 and 210. If you try to change that, you are going to screw up a whole bunch on things in the computer. If you want your cars to run that cold, then go buy a 1970's car. This one is not supposed to run that cool.

If you have some other problem causing it to go higher than that, then find the cause of it but don't try to make it run below 190.

Response From Timthecarguy719

It has everything coolant related brand new.
I'm just scared to plug the Fan back in and have it not come on and over head the engine again.
What is i put the coolant temp sensor in a pot of water thats hot enough and turn the key on?
Will that tell me if it's working rite or not?

Response From Hammer Time

You don't even need a fan if the car is moving. The only time it even needs one is when it has an extended period of idling or slow traffic and then is supposed to get a little hotter. You have a temp gauge. If it doesn't go in the red, it doesn't have a problem. As long as the fan kicks in by 210 and it's capable of bringing the temp down, all is OK. If the fan comes on and the temp continues to rise, then you have another issue somewhere.

Response From Timthecarguy719

Ok, But will what i said in the last message work for testing the system?

Response From Hammer Time

That's not going to tell you anything. You need a scan tool to see what the computer sees and a laser thermometer to see the actual engine temp. The scan tool will also tell you when the fan is requested.

Response From Timthecarguy719

My scanner said 158 degrees after it running for probably close to an hour at 57mph.
My scanner isn't that fancy to tell me all the other stuff, It just does codes, monitor information and freeze frame information.

Response From Hammer Time

Use a laser thermometer on the thermostat housing to verify the computer temp reading and see if the sensor is accurate.

Response From Timthecarguy719

Just letting you know you were rite!
I guess i need to not be scared to let it get a little hot.
It got up around 3/4 the way on the temp gauge then it kicked on for a few seconds then off.
I'm very happy! Thanks a bunch!

Response From Tom Greenleaf

If temp gauge fluctuated a lot I don't think that all right. If not done I'd consider flushing it out and not to exceed 50/50 antifreeze. Some will on some cars and be normal but most don't much.

You can get a clue if you really are overheating if the heater quits! It won't throw heat with boiling coolant, it must be a liquid,

T

Response From Hammer Time

He doesn't have a problem Tom. He's thinking old school.

Response From Timthecarguy719

Ya got that rite!
I'm very old school when it comes to cars.
I never had a car newer then a 96, everything i always had was 80's or older.
I just thought the cooler the better, but i guess the car needs to be that hot to run rite.
Thanks again man you talked me out of my car running to hot fear!

Response From Hammer Time

Your not the first one to think that. It needs that temp for a number of reasons.

Response From Timthecarguy719

Please tell me all the reasons!
I know that it will use more fuel cause the ECU thinks the engine is cold but, what are the others?

Response From Hammer Time

The ECM is looking for that temp. It won't even go into closed loop if the temp is too low and that means it will ignore the sensor data because it thinks it's in "warm up" mode indefinitely. It also won't burn the fuel totally.

Response From Timthecarguy719

So.., will i get a little better MPG now?

Response From Hammer Time

Possibly. It depends how it's driven. it's a gutless car to start with.

Response From Timthecarguy719

Just to let everyone know!
The car was drove all around today and the fan worked fine.
Thanks again!

Response From Timthecarguy719

Alrite.
I'm new to this forum and so far i love it after just one day.

Thanks very much for your time!

Response From Tom Greenleaf

Loooong thread but OK with me as we are here to share what we know as we know it. Retired from any biz of this but still tend to stuff of my own. Just checked on sensor testers vs the boiling water thing which I've done. Yikes - $500US for a cheap one!

These temp sensing sensors change the ohms that pass thru them at specific temps and computer will decide from that info. Guess if still doing more of this I'd get one but sometimes hardly worth it if the part is cheap and all testing shows it highly likely.

Tim - as Hammer has driven the point, the engine really needs to be within a specific range of temp - not too high and definitely not too low or as he said engine's computer controls could always think engine isn't warmed up yet and won't make the best adjustment for the best performance and MPGs + lower emissions which is the goal of all. It's kind of like "Don't mess with Mother Nature" type thing as it was purposely designed and a lot of thought went into even the less expensive cars.

You can buy higher or lower quality of items and frequently find out that the joy of low price doesn't add up to the pain of poor quality and ends up no bargain at all.

Another suggestion by me and no doubt others: Use OE specs for parts and if anything is left that's adjustable put it where it's supposed to be. There are more lies about additives, spark plugs high on the list that make claims of all kinds of extra power and performance and it's almost all bull. If things would improve for real it would have been there and used from new.

When and if there's truly some mistake from new recalls come along,

Tom

Response From Timthecarguy719

Ok, I'll remember that the water test will work if i ever have this problem again.
I thank everyone for all there information and help.

I was just to scared to let it idle that long i guess, but I got over it and turn up the A/C and let her idle for like 20mins and the fan came on twice.
I'm very happy!

Response From Tom Greenleaf

Note on A/C + Fans: I don't have a listing of which vehicle do and don't but many when A/C is requested the fans plain stay on. Others will detect the high pressure which equates to how hot the condenser is and only come on at a given set pressure. Either way the output vent temp should remain tolerably cool if thing are all right on the money. I generally don't care for overcomplicated anything car wise but truth is, if it doesn't need the electric fan it is a waste. Generally while driving somewhere over 30mph depending on body style of vehicle, cars no longer need help from a fan - some do even at HWY speeds?

T

Response From Hammer Time

This one has separate condenser and cooling fans.

Response From Timthecarguy719

Yup, The condenser fan comes on when the A/C is turned on and the rad fan comes on when the vehicle needs it, I just turned the A/C on for the test cause it made the engine warm up quicker.

Response From Timthecarguy719

I just got a reading of 106 degees on my multimeter.
My scan tool wont do a freeze frame unless i drive it.

Response From Timthecarguy719

I don't have one.
But i do have temp thingy on my multimeter will that work you think?

Response From Tom Greenleaf

The fan can come on so that rules out the motor I hope. If this has A/C will fan just plain run. I think it should just stay on, on this car with A/C and possibly defrost request. Can you please spell out ECT so I don't make a mistake with the acronym? Not sure why it would run with that unplugged and what else it might impact to leave it out and fan running till we can nail this down?

T

Response From Timthecarguy719

E.C.T is Engine coolant temp sensor.

My Storm starts... runs for 5-10 minutes.. stalls, then steams...

Showing 5 out of 6 Posts | Show 1 Hidden Posts
Question From mr_slm on My Storm starts... runs for 5-10 minutes.. stalls, then steams...

My Storm starts... runs for 5-10 minutes.. stalls, then steams...

There is NO indication that my 1993 Geo Storm 1.6L SOHC is overheating according to my temperature gauge on the bezel inside the car.

It runs for 5-10 minutes... dies and won't turn on again until it's
cool; so I think... must be Thermostat. However, the upper rad hose
is hot and the lower one is cool... so.. how could that be?

Anyhow, anybody with ANY suggestions would be a great help.

Thanks!
Scott

Response From mr_slm

The steam is coming from the Radiator right where the Radiator fan sits... (this is only after (and just before) it has stalled...)

Thanks.... (heeeeelp)...

Response From Tom Greenleaf

There should be NO steam there and the radiator must be full at the cap then the recovery tank. If price is important see how much to get it soldered but know how much a new one is first. Can't speak for Geo but some cars will shut down when too low on oil or coolant to save the engine. If you need to fill it up to buy some time and that works use 50/50 mix if you are dealing with cold weather at all. Just water is an emergency fix but you gotta correct that right away.

The stalling may be a separate issue. Need to know it's got coolant first. Good luck, -T

Response From mr_slm Top Rated Answer

Hello... definatly has coolant... the steam occurs then the engine shuts off. (It shuts off VERY cleanly)...

HEEEEELP! :-)

Response From carjunky

Hi.

First off...


The steam is coming from the Radiator right where the Radiator fan sits... (this is only after (and just before) it has stalled...)

Thanks.... (heeeeelp)...




Can you shake the fan, (does it move a little at the connection to the engine?)
Also is there any coolant on the ground under the car? or under the fan. (maybe check the cooliant and top it off. Then start the car for 30 seconds. Shut the car off and look for water around the fans connection to the engine, if there is water or cooliant your water pump is the problem.

(the fan and fan belt actually spin the water pump, which pushes the water cooliant mix around the engine.)

If this is the case your water pump may have gone, which is why your coolant will drain and your cars computer will shut the car off.


IN Addition:
What state are you from?

I've heard if you use staight water it freezes at 32degrees, and if you use straight anti-freeze that freezes at 10 degrees, but the mix of 50 -50 freezes at -40 degrees.

I think tom is seeing if 1) you are low on cooliant, and 2) if you have a good cooliant / water mix in the car.

Response From Tom Greenleaf

?? Not sure with this but can you pin point where the steam is coming from? Make sure coolant is full and check it's freeze protection too. - T

p0125 (Insufficient Coolant Temperature For Closed Loop Fuel Control)

Showing 3 out of 16 Posts | Show 13 Hidden Posts
Question From completelyhis on p0125 (Insufficient Coolant Temperature For Closed Loop Fuel Control)

1997 Geo Prism, 1.6 liter, 175k miles.

I get a P0125 (Insufficient Coolant Temperature For Closed Loop Fuel Control). I have changed the temperature sensor, thermostat, checked coolant level, repaired the exhaust lead that was @ the doughnut flange, and then replaced the front o2 sensor.

The engine gets to "normal" operating temperature w/in a normal time (a few minutes). It runs great. When I clear the code, it comes back within 10 miles or less after clearing it.

I read this here
link deleted............. not allowed

I know that the drive train for the prism is a toyota drive train, so that conversation is relavent, but I don't see a solution I haven't tried.

Any suggestions?

Thanks,

Ian

Response From DRND

I have good experience with this code with toyota 1nz-fe engine i reset code but it take after 15km - 35km
So.....
You should check your system clearly by using car scanner and look at ECT,O2 B1 S1,O2 B2 S2 sensor's values.some time u will feel O2 B1 S1 value is less than other O2 sensor value.but it's OK because O2 sensor locate at after cat(per-cat).but clearly monitor your O2 B1 sensor's value is less than 0.1mv. the ECM monitor this value in time period and set this code
So i swap O2 B1 and O2 B2 sensor then O2 B1 reading was ok.after i drive 100km but not it take this code

Response From Tom Greenleaf

Sport - this is about THREE years old! Please stick to current threads. Locked for archives and keep spammers out now,

T

Response From Hammer Time

I've never heard such an idiotic response either.

Response From Hammer Time

You really need a scan tool so you can monitor what temp the computer is seeing and you can then determine if and where the problem is.

Response From completelyhis

i assume that's different than my "auto xray" code reader? Can you recommend a good scan tool?

Response From Sidom

I think HT is right and it's going to be a temp sensor problem...... Most of the time with this code you have a stuck open T stat. If this code is setting within 10 minutes during this time of the year, it would have to be a electrical problem.

How's it run? Any black smoke out the back or hard starting????

Response From completelyhis

no smoke, starts great runs solid and strong. replaced Tstat and temp sensor. I replaced the one that's on the thermostat housing, with a two-wire harness connected to it...is that the right one?

electrical problem...could you elaborate?

Ian

Response From Tom Greenleaf

You can OHM test CTS and should show that it changes as engine warms up. I don't have the range but most are fine or do nothing. The plug can be the problem,

T

Response From Hammer Time

I think your wasting your time with those types of tests. The code here is indicating that there is insufficient temp for closed loop. I have had to deal with this code before. This can come down to a matter of just a couple degrees so unless you see the exact digital temp that the computer is seeing, your not going to solve this problem. I had one that continuously failed emission but never set any codes and it turned out to be the calibration of the thermostat. It was only about 5 degrees low but that was enough to prevent it from going into closed loop and in turn made it fail emissions.

Response From completelyhis

I took the car to a guy who has the ability to read the ECM data and it ends up that the computer is reading zero's from the o2 sensor.

i did some research and found these suggestions:

Verify continuity between the ECM and O2 Sensor
Make sure that there is 12 V making it to the O2 sensor
Check the resistance of the sensor (should be between 11 and 17 Ohms).
Are those good things to check? Any other testing I could/should do? I assume it's either bad wiring or a bad ECM. Is that a safe assumption? Where is the ECM on the 97 prism, so I can check continuity between it and the o2 sensor? Is there any reason to check the resistance of the sensor other than confirming if the sensor is good or not?

Thanks,

Ian

Response From Hammer Time

That has nothing to do with the code you are getting. I actually find that hard to believe since you don't have any lean codes.

Response From completelyhis

I looked at the device he had hooked up to it while it was hooked up, i saw the MAF readings and all the other ones updating in real time. the o2 was zero constantly. i trust him.

Following are things I've seen about the Toyota obdII codes as it pertains to this:


  • I think that I remember Toyota mis-defining that code number. It's supposed to refer to the O32 sensor signal or heater or the sensor itself. I think I remember that from somewhere that Toyota mis reads that code.
  • By accident I left coolant temperature sensor disconnected. It generated 2 codes. p0115 and p0125. P0115 is the temperature coolant sensor. P0125 Has to do with not getting into a closed loop circuit. Auto Zone listed the cure for the code (125) as faulty temp. sensor, 2. bad thermostat or3. low on coolant. When I rewired the O2 sensor the Mil went out, no more codes,
    From my experience on a Toyota P0125 was a disconnected or bad O2 sensor. Before cat. converter. Code p0115 is disconnected or bad coolant temperature sensor. Not the sensor that controls temp. gauge on dash but sensor that controls fuel mixture. It has a plug with 2 wires connecting. The temp. gauge sensor has one wire,and it is located on the end of the engine very close to the distributor. The coolant temp. sensor is located on the firewall side of the head also close to the distributor but it faces at a right angle to the distributor.
  • I have exactly the same behavior with a 2000 Corolla. If I unplug the oxygen sensor, a few minutes later, I get a P0125 Insufficient Coolant Temperature... followed shortly by a P0135 O2 Heater Circuit.... The latter makes sense, the former, not so much. Apparently a bug in Toyota's software.
  • on some models, Toyota does not adhere to the SAE standard definition for DTC P0125. That code can be for a Coolant Temperature Sensor concern, but it can also relate to O2 sensor function... which would make more sense that a P0135 would follow.
    Fault trace the O2 sensors and if the PCM and harness check out, replace the sensor(s) with O.E. parts.


  • I'm not trying to be confrontational - just trying to figure the darned thing out!

    Ian

    Response From Hammer Time Top Rated Answer

    You know, this is my fault for just taking your word for the definition of this code number. After looking into the code, it appears that it has nothing at all to do with coolant temp.
    P0125




    CIRCUIT DESCRIPTION
    The Oxygen sensor (O2S) produces a voltage that varies between 0.1 V and 0.9V under normal operating conditions. The Engine Control Module (ECM) monitors this voltage and determines if the exhaust is lean or rich. If the voltage input at the ECM is about 0.1V the exhaust is lean, and if the voltage input is about 0.9V the exhaust is rich. The ECM constantly monitors the O2S 1 signal during closed loop operation and compensates for a rich or lean condition by decreasing or increasing injector pulse width as necessary.

    CONDITIONS FOR SETTING THE DTC
    After engine is at normal operating condition, O2S 1 output does not indicate RICH within 7.5 minutes when the following condition are met.

  • Engine speed at 1,500 RPM or more.
  • Vehicle speed at 25-62 MPH.
  • Throttle valve position is open.
  • Engine has been running for at least 140 seconds.

  • ACTION TAKEN WHEN THE DTC SETS
  • The ECM will illuminate the MIL during the second key cycle in which the DTC sets.
  • The ECM will store the conditions which were present when the DTC set as Freeze Frame Data.

  • CONDITIONS FOR CLEARING THE MIL/DTC
  • The ECM will turn the MIL OFF on the third consecutive trip cycle during which the diagnostic has been run and the fault condition is no longer present.
  • A DTC will clear after 40 consecutive warm-up cycles have occurred without a fault.
  • A DTC can be cleared by using the scan tool Clear Information function or by disconnecting the ECM battery feed.

  • DIAGNOSTIC AIDS
    Check for the following conditions:
  • Oxygen sensor wiring. The sensor pigtail may be mispositioned and contacting the exhaust system.
  • Poor ECM to engine grounds.
  • Fuel pressure. A condition which causes a lean exhaust can cause DTC P0125 to set. The system will go lean if pressure is too low. The ECM can compensate for some decrease. However, if fuel pressure is too low, a DTC P0125 may be set. Refer to Fuel System Diagnosis.
  • Lean injector(s).
  • Vacuum leaks. Check for disconnected or damaged vacuum hoses and for vacuum leaks at the intake manifold, throttle body, EGR system, and crankcase ventilation system.
  • Exhaust leaks. An exhaust leak may cause outside air to be pulled into the exhaust gas stream past the O2S, causing the DTC P0125 to set. Check for exhaust leaks near the O2S 1 sensor.
  • Fuel contamination. Water, even in small amounts, can be delivered to the fuel injectors. The water can cause a lean exhaust to be indicated. Excessive alcohol in the fuel can also cause this condition. Refer to Alcohol-Contaminants-In-Fuel Test for procedure to check for fuel contamination.

  • The information included in the Freeze Frame data can be useful in determining the vehicle operating conditions when the DTC first set.

    If any wiring repairs need to be made, Refer to Repair Procedures in Diagrams.

    TEST DESCRIPTION
    Number(s) below refer to the step number(s) on the Diagnostic Table.
    1. The OBD System Check prompts the technician to complete some basic checks and store the freeze frame data on the scan tool if applicable. This creates an electronic copy of the data taken when the fault occurred. The information is then stored in the scan tool for later reference.
    2. This step verifies whether the malfunction is a hard failure or an intermittence.
    1. This step verifies whether the ECM is able to receive a signal from the O2S 1.

    Response From Sidom

    You are little off base here with the code you are getting...

    Your O2 data is way off base but since it's not related to the code there is really no sense going into this right now...

    The code you posted is for an engine that is running too cool. Computer controlled engines require a minimum of 195° for peak performance. It's to the point now that and OBD II systems will actually set a code if it runs too cool after going into closed loop.

    The usual problem for this code is a stuck open T stat.

    You've changed it and even with an AM non-OE stat I would find it highly unlikely that the new aftermarket one is defective and sticking open as well. So the next thing to check would be the ECT (coolant temp) sensor and reading the PCM is getting.

    With the scanner the 1st thing you will want to do is look at the ECT PID and see if the temp is correct for how hot the engine is or wait until the morning and look at it and the temp should be very close to the ambient temp. So is it's 70 out & temp is showing 30° then you found your problem. If not it gets a little harder, you'll need to access the freeze frame data, find out when the code set & try and duplicate the conditions......

    Honestly, for a DIYer with minimal tools, you could change the T stat and then ECT sensor and connecter, if you are still getting the same code it would probably be best to take the car into a shop to have checked out....But if you have the experience to trace a possible intermittent voltage drop/short/ open in the wiring then that would be the next step before condemning the PCM.......

    Response From Hammer Time

    Yours may work. I'm not familiar with it. You just need something capable of displaying the digital coolant temp reading coming from the sensor.

    1991 Geo Prizm Overheating

    Showing 2 out of 2 Posts
    Question From MushMush on 1991 Geo Prizm Overheating

    I have a 1991 Geo Prizm with about 170000 miles on it.

    After driving it for about 2 hours straight it appears to start overheating. Whenever I stop the car I hear a gurgling/liquid sound from under the hood after the car is stopped and turned off, I haven't looked yet when the car is running and hot. This seems to be coming from the coolant reservoir. I also noticed the that reservoir container is covered and dripping in coolant, along with the area right underneath it. It seems to be too hot to check the fluids at that time but when I check them later, next day or so, there is no fluids left in either the radiator and reservoir. Before driving I made sure that all the fluid levels were at the recommended levels and used an already mixed coolant/water mixture. When adding fluids I noticed no immediate leaking. I only noticed some dripping after the car had been running from a small, about 1 inch, 90 degree elbow hose, pointing downward. This hose isnt attached to anything except the reservoir cap and looks likes its supposed to be some sort of hose to allow for overflow or something similar, but that is just a guess by me. It was just a slow drip with the car off, but still hot after driving for 2 hours. It may be coming out more when the car is running and this is where all the coolant is going.

    So quick summary. Car really started to overheat on the temp gauge, when shut off car heard gurgling sounds from coolant reservoir. Coolant reservoir and nearby areas dripping in coolant. When these fluids are checked later there is no fluids in either of them and no immediate leaks when more is added.

    Any ideas as to what I can do?

    Thanks

    Response From Loren Champlain Sr Top Rated Answer

    MushMush; This could be as simple as a weak radiator cap, allowing coolant to bypass it, going into the reservoir, overflowing, ect., ect,...
    On the other hand, something may be causing the engine to over heat, pressure building to the point that the cap can't handle it. Cooling fan inoperative, thermostat, head gasket, ect. Need to get the cooling system diagnosed. If the head gasket hasn't blown yet, it will if the engine gets hot enough.