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    Spectra
  • Standard Ignition
    Standard Ignition
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    Vemo
  • Walker Products
    Walker Products

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  • We Stock the following top leading brands, including Denso, Cardone, Walker Products, Beck Arnley, Delphi, NGK, Spectra, Standard Ignition
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We also have Mass Air Flow Sensor parts for other Lexus models, including ES330, GS300, GS400, GX470, IS250, IS300, LS400, LS430, LX470, RX300, RX330, RX350, SC300, SC400.


Denso
2009 Lexus IS250 Mass Air Flow Sensor Denso

P311-3D7BD5E    W0133-1786065  New

Qty:
In Stock & Ready to Ship
$167.26
Denso Mass Air Flow Sensor
  • This Original Equipment Manufacturer part is the same part that was made & installed by the car manufacturer at the factory where the car was produced.
  • First Time Fit
Brand: Denso
Additional Fitment Information:
Vehicle
2009 - Lexus IS250
Cardone
2007 Lexus IS250 Mass Air Flow Sensor Cardone - Mass Air Flow Sensor

P311-191E36D    86-50057  New

222040H010 , 222040P010 , 2220431010 , 2220431020 , 88975798

Qty:
In Stock & Ready to Ship
$133.70
Cardone Mass Air Flow Sensor
  • Mass Air Flow Sensor
  • CARDONE Engineered Technology ensures that all CARDONE® New Mass Air Flow Sensors precisely track O.E. output curves and maintain strict tolerances to ensure accurate scan tool readings for proper operation. Every component is rated to handle a broad range of environmental conditions, including temperature and altitude.
Brand: Cardone
Additional Fitment Information:
Vehicle
2007 - Lexus IS250
Cardone
2015 Lexus IS250 Mass Air Flow Sensor Cardone - Mass Air Flow Sensor

P311-57A283D    74-50073  Remanufactured

1380054L00 , 19204726 , 222040T020 , 222040T040 , 222040V010 , 222040V020 , 2220428010 , 2220437010 , 22680AA400 , 88975816

Qty:
In Stock & Ready to Ship
$36.90 $121.21
Cardone Mass Air Flow Sensor
  • Mass Air Flow Sensor
  • CARDONE® Remanufactured Mass Air Flow Sensors (MAFS) precisely track O.E. output curves and maintain specific tolerances to ensure accurate scan tool readings for proper operation. 100% re-soldering of critical components ensures superior electrical connections, eliminates intermittent failures and lengthens product life. With CARDONE Mass Air Flow Sensors (MAFS), you can expect smooth vehicle performance.
Brand: Cardone
Additional Fitment Information:
Vehicle Submodel
2015 - Lexus IS250 C
Cardone
2006 Lexus IS250 Mass Air Flow Sensor Cardone - Mass Air Flow Sensor

P311-0392338    74-50057  Remanufactured

222040H010 , 222040P010 , 2220431010 , 2220431020 , 88975798

Qty:
In Stock & Ready to Ship
$27.90 $99.72
Cardone Mass Air Flow Sensor
  • Mass Air Flow Sensor
  • CARDONE® Remanufactured Mass Air Flow Sensors (MAFS) precisely track O.E. output curves and maintain specific tolerances to ensure accurate scan tool readings for proper operation. 100% re-soldering of critical components ensures superior electrical connections, eliminates intermittent failures and lengthens product life. With CARDONE Mass Air Flow Sensors (MAFS), you can expect smooth vehicle performance.
Brand: Cardone
Additional Fitment Information:
Vehicle
2006 - Lexus IS250
Walker Products
2011 Lexus IS250 Mass Air Flow Sensor 6 Cyl 2.5L Walker Products - Walker Mass Air Flow Sensor

P311-36FD7F8    245-1150  New

158-1092 , 197-6110 , 213-4301 , 213-4544 , 221203 , 22204-0H010 , 22204-0P010 , 22204-0T010 , 22204-31010 , 22204-31020 , 5S9128 , 64-1936 , 74-50057 , 86-50057 , 88975798 , 91258 , 917-961 , AF10202 , DMA-0110 , MA175 , MAS0281 , MAS0317 , MAS0363 , MF21203 , MF21203N , SU10590

Qty:
In Stock & Ready to Ship
$67.73
Walker Products Mass Air Flow Sensor
  • Walker Products 245-1150 Mass Air Flow Sensor
  • Mass Air Flow Sensors measure the amount of air by weight through changing voltages or frequencies and send this information to the onboard computer. The computer uses this and other inputs to calculate the correct amount of fuel delivered.
  • Walker Mass Air Flow Sensor
  • Product Attributes:
    • CA_Prop65_Lead: Warning: This Product Can Expose You To Chemicals, Including Lead, Which Is Known To The State Of California To Cause Cancer Or Birth Defects Or Other Reproductive Harm. Www.p65warnings.ca.gov
    • Connector Gender: Female
    • Housing Included: No
    • Mounting Hardware Included: Yes
    • Terminal Quantity: 5
  • Walker Products began supplying the fuel system needs of the automotive industry in 1946. Today Walker is one of the largest, privately owned manufacturers of fuel system components and engine sensors, and has served the needs of the worldwide automotive aftermarket. We are committed to supplying products manufactured to meet or exceed OEM standards and specifications. This effort is backed by our own manufacturing, product management and engineering staff to ensure it is maintained and accurate in the production of quality parts, vehicle applications, instruction sheets and technical support. Our products include Carburetor and Fuel Injection Repair Kits, Oxygen Sensors and other Engine Management products such as Throttle Position Sensors, Cam and Crankshaft Sensors, Fuel Injectors, Spark Plug Wires and Gaskets. As an ISO 9001/IATF16949 certified company, we are committed to supplying the highest quality products.
Brand: Walker Products
Additional Fitment Information:
Vehicle Engine Designation Aspiration Block Engine CID CC
2011 - Lexus IS250 4GR-FSE Naturally Aspirated V 6 Cyl 2.5L - 2499
Walker Products
2015 Lexus IS250 Mass Air Flow Sensor 6 Cyl 2.5L Walker Products - Walker Mass Air Flow Sensor

P311-3220DCF    245-1244  New

13800-54L00 , 19204726 , 19352 , 197-6130 , 197-6160 , 213-4300 , 214-4238 , 221145 , 22204-0T020 , 22204-0T040 , 22204-0V010 , 22204-0V020 , 22204-28010 , 22204-37010 , 4M-1094 , 5S13505 , 74-50070 , 74-50073 , 86-50070 , 88975816 , MA320 , MAS0314 , MF21145 , SU14913

Qty:
In Stock & Ready to Ship
$96.86
Walker Products Mass Air Flow Sensor
  • Walker Products 245-1244 Mass Air Flow Sensor
  • Mass Air Flow Sensors measure the amount of air by weight through changing voltages or frequencies and send this information to the onboard computer. The computer uses this and other inputs to calculate the correct amount of fuel delivered.
  • Walker Mass Air Flow Sensor
  • Product Attributes:
    • CA_Prop65_Lead: Warning: This Product Can Expose You To Chemicals, Including Lead, Which Is Known To The State Of California To Cause Cancer Or Birth Defects Or Other Reproductive Harm. Www.p65warnings.ca.gov
    • Connector Gender: Female
    • Housing Included: No
    • Mounting Hardware Included: Yes
    • Terminal Quantity: 5
  • Walker Products began supplying the fuel system needs of the automotive industry in 1946. Today Walker is one of the largest, privately owned manufacturers of fuel system components and engine sensors, and has served the needs of the worldwide automotive aftermarket. We are committed to supplying products manufactured to meet or exceed OEM standards and specifications. This effort is backed by our own manufacturing, product management and engineering staff to ensure it is maintained and accurate in the production of quality parts, vehicle applications, instruction sheets and technical support. Our products include Carburetor and Fuel Injection Repair Kits, Oxygen Sensors and other Engine Management products such as Throttle Position Sensors, Cam and Crankshaft Sensors, Fuel Injectors, Spark Plug Wires and Gaskets. As an ISO 9001/IATF16949 certified company, we are committed to supplying the highest quality products.
Brand: Walker Products
Additional Fitment Information:
Vehicle Block Engine CID CC
2015 - Lexus IS250 V 6 Cyl 2.5L - 2499
Beck Arnley
2007 Lexus IS250 Mass Air Flow Sensor 6 Cyl 2.5L Beck Arnley

P311-2400FF6    158-1092  New

Qty:
In Stock & Ready to Ship
$121.28
Beck Arnley Mass Air Flow Sensor
  • AIR MASS SENSOR
  • NEW
  • Product Attributes:
    • ORDER MULTIPLES: 1
  • Beck/Arnley parts meet foreign nameplate OE specifications for form, fit and function. Our product specialists work with a network of global sourcing partners so you can install the right part with confidence.
Brand: Beck Arnley
Additional Fitment Information:
Vehicle Block Engine CID CC
2007 - Lexus IS250 V 6 Cyl 2.5L - 2499
Delphi
2010 Lexus IS250 Mass Air Flow Sensor 6 Cyl 2.5L Delphi

P311-1EBFB82    AF10202  New

158-1092 , 158-1572 , 197-6110 , 213-4544 , 2134544 , 22204-0H010 , 22204-0T010 , 22204-31010 , 22204-31020 , 222040H010 , 222040T010 , 2220431010 , 2220431020 , 5S9128 , 74-50057 , MA175 , MAF10202 , MAS0281 , MF21203 , SU10590 , XTP450057

Qty:
In Stock & Ready to Ship
$99.59
Delphi Mass Air Flow Sensor
  • Mass Air Flow Sensor
  • Probe Only
  • Product Attributes:
    • Color: Black And Silver
    • Housing Included: No
    • Terminal Gender: Male
    • Terminal Quantity: 5
    • Terminal Type: Pin
    • Wiring Harness Included: No
  • 100 years of OE experience, supplier to the world's top automakers, OE Heritage and knowledge built into every aftermarket part.
Brand: Delphi
Additional Fitment Information:
Vehicle Aspiration Block Engine CID CC
2010 - Lexus IS250 Naturally Aspirated V 6 Cyl 2.5L - 2499
Delphi
2015 Lexus IS250 Mass Air Flow Sensor 6 Cyl 2.5L Delphi

P311-2D99F11    AF10347  New

13800-54L00 , 19204726 , 197-6160 , 2134300 , 22204-0T020 , 22204-0T040 , 22204-0V010 , 22204-0V020 , 22204-28010 , 22204-37010 , 22680 AA400 , 74-50073 , 88975816 , MA192 , MA320 , MAF20160 , MAS0314 , SU003-00427 , XTP450073

Qty:
In Stock & Ready to Ship
$94.73
Delphi Mass Air Flow Sensor
  • Mass Air Flow Sensor
  • Probe Only
  • Product Attributes:
    • Color: Black
    • Housing Included: No
    • Terminal Gender: Male
    • Terminal Quantity: 5
    • Terminal Type: Pin
    • Wiring Harness Included: No
  • 100 years of OE experience, supplier to the world's top automakers, OE Heritage and knowledge built into every aftermarket part.
Brand: Delphi
Additional Fitment Information:
Vehicle Block Engine CID CC
2015 - Lexus IS250 V 6 Cyl 2.5L - 2499
Denso
2008 Lexus IS250 Mass Air Flow Sensor Denso

P311-1A5CACC    197-6110  New

158-1092 , 158-1572 , 197-6110 , 1976110 , 213-4544 , 22204-0H010 , 22204-0P010 , 22204-0T010 , 22204-31010 , 22204-31020 , 5S9128 , 64-1936 , 74-50057 , 86-50057 , AF10202 , MA1195 , MAS0363 , MF50057 , SU10590 , XTP450057

Qty:
In Stock & Ready to Ship
$96.28
Denso Mass Air Flow Sensor
  • Mass Air Flow Sensor
  • DENSO is the OE supplier for this vehicle
  • Mass Air Flow Sensor
  • Product Attributes:
    • Color: Black
    • Connector Gender: Female
    • Connector Quantity: 1
    • Housing Included: No
    • Mounting Hardware Included: No
    • Terminal Quantity: 5
    • Terminal Type: Pin
  • DENSO's innoviate designs reduces the size and weight which allows for easy installation. Glass film coated sensing elements reduces contamination exposure and improves reliability.
Brand: Denso
Additional Fitment Information:
Vehicle Engine Designation Aspiration Fuel Type Fuel Delivery Type
2008 - Lexus IS250 4GR-FSE Naturally Aspirated GAS FI
Denso
2015 Lexus IS250 Mass Air Flow Sensor Denso

P311-2BD582B    197-6160  New

13800-54L00 , 197-6160 , 1976160 , 213-4544 , 22204-0T020 , 22204-0T040 , 22204-0V010 , 22204-0V020 , 22204-28010 , 22204-37010 , 22680 AA400 , 31380619 , 64-2046 , 74-50073 , MAS0314 , MF50073 , SU14913 , XTP450073

Qty:
In Stock & Ready to Ship
$96.28
Denso Mass Air Flow Sensor
  • Mass Air Flow Sensor
  • DENSO is the OE supplier for this vehicle
  • Mass Air Flow Sensor
  • Product Attributes:
    • Color: Black
    • Connector Gender: Female
    • Connector Quantity: 1
    • Housing Included: No
    • Mounting Hardware Included: No
    • Terminal Quantity: 5
    • Terminal Type: Pin
  • DENSO's innoviate designs reduces the size and weight which allows for easy installation. Glass film coated sensing elements reduces contamination exposure and improves reliability.
Brand: Denso
Additional Fitment Information:
Vehicle
2015 - Lexus IS250
NGK
2011 Lexus IS250 Mass Air Flow Sensor NGK - NTK Mass Air Flow Sensor

P311-396C0E7    MG0025  New

Qty:
In Stock & Ready to Ship
  • Sensor Only
  • NTK Mass Air Flow Sensor
  • Building upon a foundation of premium full-line products established under NGK ignition and NTK oxygen sensor products, NTK’s expansion to technical sensors is part of our ongoing commitment to streamline product types and increase coverage under one premium brand: NTK, The Sensor Specialist. With over 80 years of automotive expertise, NGK’s family of automotive products are driven by extreme dedication to innovation, performance and quality. NTK is the only OE supplier with a full line of technical sensors in the aftermarket for import and domestic vehicles. Drawing from OE experience, NTK sensors undergo extreme testing conditions that include thermal shock, vibration and OBD verification. NTK sensors are manufactured to ensure a quality that meets or exceeds OE specifications. As new vehicles incorporate connected and automated technologies, trust The Sensor Specialist for full-line market support and OE application technology.
Brand: NGK
Additional Fitment Information:
Vehicle
2011 - Lexus IS250
Spectra
2012 Lexus IS250 Mass Air Flow Sensor 6 Cyl 2.5L Spectra

P311-1A419F4    MA175  New

1976110 , 221203 , 221203P , 222040H010 , 222040P010 , 2220431010 , 2220431020 , 2451150 , 641936 , 7450057 , 8650057 , 917961 , AF10202 , MA1118 , MAF10202 , MAF1087 , MAS0281 , MAS0363 , MF21203 , MF21203N , MF21203T , MQ6225 , XTP450057

Qty:
In Stock & Ready to Ship
$101.27
Spectra Mass Air Flow Sensor
  • Mass Air Flow Sensor
  • Sensor Only
  • Product Attributes:
    • California_Prop 65 Message: Y
  • Our mass air flow sensors have a programmable ceramic circuit board make of premium grade silicon coating to protect from severe under hood temperature fluctuations and road vibrations. The optimal circuit design allows faster signal response and consistancy with the use of new all platinum resistance thermometer sensors.
Brand: Spectra
Additional Fitment Information:
Vehicle Block Engine CID CC
2012 - Lexus IS250 V 6 Cyl 2.5L - 2499
Spectra
2015 Lexus IS250 Mass Air Flow Sensor 6 Cyl 2.5L Spectra

P311-1E1F92D    MA320  New

1380054L00 , 1976160 , 222040T020 , 222040T040 , 222040V010 , 2220428010 , 2220437010 , 22680AA400 , 2451244 , 5S13505 , 7450073 , AF10347 , AF10424 , MAF1140 , MAF20160 , MAS0314 , MAS0510 , MF21359 , MQ6279 , SU00300427 , SU14913 , XTP450073

Qty:
In Stock & Ready to Ship
$101.96
Spectra Mass Air Flow Sensor
  • Mass Air Flow Sensor
  • Sensor Only
  • Product Attributes:
    • California_Prop 65 Message: Y
  • Our mass air flow sensors have a programmable ceramic circuit board make of premium grade silicon coating to protect from severe under hood temperature fluctuations and road vibrations. The optimal circuit design allows faster signal response and consistancy with the use of new all platinum resistance thermometer sensors.
Brand: Spectra
Additional Fitment Information:
Vehicle Block Engine CID CC
2015 - Lexus IS250 V 6 Cyl 2.5L - 2499
Standard Ignition
2015 Lexus IS250 Mass Air Flow Sensor 6 Cyl 2.5L Standard Ignition

P311-29AB61F    MAS0314  New

009142961 , 1920-4726 , 19204726 , 197-6160 , 1MF284 , 2-14680 , 222040T020 , 222040V010 , 245-1244 , 5S13505 , 74-50073 , AF10347 , DL-3096 , MA1144 , MA320 , SU14913 , V70-72-0243

Qty:
In Stock & Ready to Ship
$78.69
Standard Ignition Mass Air Flow Sensor
  • Mass Air Flow
  • Product Attributes:
    • Attachment Method: Bolt On
    • Connector Gender: Female
    • Connector Quantity: 1
    • Connector Shape: Oval
    • Housing Included: No
    • Material: Plastic
    • Notes: Sensor Only
    • Terminal Gender: Male
    • Terminal Quantity: 5
    • Terminal Type: Pin
  • 100% new, never remanufactured, so there's no leftover debris that can cause sensor failure. 100% computer-tested to ensure the ECU receives accurate airflow readings under hard engine conditions, which are required to balance and deliver the correct air/fuel ratio to the engine in order to achieve clean burns. Dual-heated sensing elements ensure superior performance in any air/fuel system. High-quality sensing elements in airflow meter withstand changes in supply voltage. Manufactured to strict quality standards to ensure each part outperforms other air flow sensors in aftermarket.
Brand: Standard Ignition
Additional Fitment Information:
Vehicle Block Engine CID CC
2015 - Lexus IS250 V 6 Cyl 2.5L - 2499
Standard Ignition
2012 Lexus IS250 Mass Air Flow Sensor 6 Cyl 2.5L Standard Ignition

P311-39BDCA0    MAS0363  New

009142951 , 158-1092 , 197-6110 , 1MF218 , 2-14709 , 222040H010 , 222040P010 , 2220431010 , 2220431020 , 245-1150 , 4M-1094 , 5S9128 , 74-50057 , 86-50057 , 917-961 , AF10202 , DL-3010 , MA1195 , MA175 , MAF1087 , MQ6225 , SU10590 , V70-72-0020-1

Qty:
In Stock & Ready to Ship
$81.53
Standard Ignition Mass Air Flow Sensor
  • Mass Air Flow
  • Product Attributes:
    • Attachment Method: Bolt On
    • Connector Gender: Female
    • Connector Quantity: 1
    • Connector Shape: Oval
    • Housing Included: No
    • Material: Plastic
    • Notes: Sensor Only
    • Terminal Gender: Male
    • Terminal Quantity: 5
    • Terminal Type: Pin
  • Our newly manufactured mass air flow sensors provide your vehicle's ECU with accurate air flow readings, which are required to balance and deliver the correct air/fuel ratio to the engine in order to achieve clean burns.. Each of our mass air flow sensors is 100% newly manufactured to offer a better alternative to remanufactured sensors, which often contain left over debris contamination that ultimately leads to sensor failure.. Every one of our sensors is manufactured to strict OE specifications to ensure the part you receive will outperform other air flow sensors found in the aftermarket.. This sensor has been put through a variety of durability and environmental tests to ensure it provides maximum performance under the harshest driving conditions..
Brand: Standard Ignition
Additional Fitment Information:
Vehicle Block Engine CID CC
2012 - Lexus IS250 V 6 Cyl 2.5L - 2499
Denso
2006 Lexus IS250 Mass Air Flow Sensor Denso

P311-3D7BD5E    W0133-1786065  New

Qty:
In Stock & Ready to Ship
$167.26
Denso Mass Air Flow Sensor
  • This Original Equipment Manufacturer part is the same part that was made & installed by the car manufacturer at the factory where the car was produced.
  • First Time Fit
  • Production: 08/01/2005-
Brand: Denso
Additional Fitment Information:
Vehicle Prod. Date Range
2006 - Lexus IS250 Fr:08-01-05

Latest Car Advice

CarJunky AutoAdvice

mass air flow sensor replaced but code still keeps coming on and off

Showing 3 out of 3 Posts
Question From o3chevy on mass air flow sensor replaced but code still keeps coming on and off

I have a 2003 chevy avalanche it had a mass air flow sensor code so i replaced the mass air flow sensor but the code keeps coming on and off. Along with this the transmission does not shift properly. sometimes the rpms will go to 4500 before it will shift. Are these two problems connected somehow?

Response From Hammer Time Top Rated Answer

Just because you have a code referring to a specific sensor does not mean the sensor is the cause. The problem still needs to be troubleshooted properly.
Make sure there are no air leaks in the intake snorkel anywhere.

Response From Discretesignals

What is the trouble code number? Which engine?

Mass Air Flow sensor?

Showing 3 out of 3 Posts
Question From ford91486 on Mass Air Flow sensor?

Just a general question here. My mechanic did some engine work for me. Now it is idleing like crap and I am having problems with my fuel delivery. It is running really rich and my emissions are real high according to my inspection that just failed. I tried to locate my Mass Air Flow sensor to clean it. I cant find it. I called my mechanic up and asked him where it was. He said it does not have one. Is it possible for my Truck to not have a MAF.

It is a 1992 Ford F150. With a 1995 302 V8 5.0L.


Thanx for all your help.

Response From way2old

If it is a 92, it will not have a MAF. It probably has a MAP sensor. Click here for some information.

Response From ford91486 Top Rated Answer

Ok That makes perfect sence. I am replacing the MAP. I wasnt sure if I should have both the MAP and MAF.

1995 Nissan Maxima stalls and sputters

Showing 3 out of 5 Posts | Show 2 Hidden Posts
Question From krbucks1 on 1995 Nissan Maxima stalls and sputters

I have a 1995 Nissan Maxima GXE 3.0 V6 180,000 miles. The car will stall at a stop or when preparing to turn as the RPMs drop below 1000. The car will also sputter slightly at 2200 rpms when driving down the highway. It does not do this all the time and it sometimes will go a few days with out this problem. I have replaced ignition coils, idle air control valve, and oxygen sensors. I have also cleaned the mass air flow sensor. I am currently thinking about replacing the mass air flow sensor but know it is a pricey part to do so with.

Response From Sidom

That's a pretty steep guess if you're wrong. A lot of times cleaning a MAF will make some kind of difference if it's the problem...

I noticed you posted a problem happening at "under 1000 rpms". Normally you should be able to go to 400 or 500 with out the engine dying. I would make sure there isn't any vacuum leaks and the secondary ignition is in good shape....

Is the check engine light on? If so get the codes pulled.....

Response From krbucks1

Cleaning it made no difference but I will try that again. The check engine light is not on. The optimum idle RPM is suppossed to be arounfd 650. It hovers around that before stalling out.

Response From Sidom

When you redo the MAF get a can of throttle body cleaner and clean the throttle body as well...... get a little brush open up the throttle plate by hand, spray some cleaner down there and clean it real good. Start it every so often so it doesn't flood out. You can even spray some down there while running it & feathering the throttle to keep it running.....

They make special cleaner for the MAF sensors, hopefully you were using that & not carb clean....


Response From krbucks1 Top Rated Answer

That's what I used. I will definately try cleaning the throttle body. Thanks.

Map sensor

Showing 2 out of 2 Posts
Question From redredeye on Map sensor

where is the MAP sensor located on a 1991 3.8L buick

Response From Hammer Time Top Rated Answer

It doesn't have one. It uses a Mass Air Flow sensor.

mass air flow sensor

Showing 3 out of 8 Posts | Show 5 Hidden Posts
Question From Guest on mass air flow sensor

2003 chevy 3500 express van
6.0 vortec engine
125,000 miles

would I get a code for a bad air flow sensor or would I just get the symptoms of having a bad one.

and could one of the symtoms be running lean. I am trying to troubleshoot this problem and this was just a lead I

got. My main problem is truck will start and run fine then check engine light comes on truck will then run rough

(misfires), then the truck will correct itself and run fine again. this will happen through out the day. The truck is running or idling for 5-8 hours a day

Response From Guest

You can get a specific failure code for a MAF if it fails out of range but it can also fail within parameters & not set MAF specific codes but other related codes.

I didn't notice any codes in this thread so I'm not sure what you are getting... Some usually within parameter codes you can get are P0171 & P0174 lean bank 1, lean bank 2, but there are alot, alot of things that can set those codes...

Intermittens can be tricky to find. You got some good advise... along with the codes is the freeze frame data that stores when a code sets.... that will tell you the driving conditions when the codes sets & help duplicate the conditions.

sounds like you've already replaced some parts & so hopefully your tech has already check the TSBs & your calibration code of the PCM to make sure it has the most current flash...

I've seen some drivability probs solved with just a simple updated reflash....

Response From Loren Champlain Sr

Computers are great, but we can't rely on them 100%. They don't always catch every hiccup. We've fixed many
MAF sensors by just cleaning them. I'm not sure if yours is accessable or not. Are you losing injector pulse when the problem occurs? Yes, a lean or a rich condition can cause your symptoms. It also can get very expensive throwing parts at it, as you probably already know. Sometimes, no most always, it is cheaper in the long run to have a tech diagnose it for you. You can still do the repairs, but...

Response From Guest

loren,

the problem is my highly paid mechanic seems to be guessing too. Costing me not only parts but labor. Just wanted to know if my map was bad would I get a code for it or just symptom codes?

Response From Loren Champlain Sr

Generally speaking, you would get a code. If your tech can catch it while it is acting up, he should be able to watch live data on his scanner. Sometimes (and I stress, sometimes) you can tap on the MAF with the plastic handle of a screwdriver and get them to act up (if faulty), but not always. There are so many things that could be causing a problem. Can the tech take it for a drive, maybe with you driving, so he can watch the scan data?
Intermittent problems can be a real nightmare to find. Good luck.

Response From Guest

Intermitten, I'll say. This is a work truck and is used for a route, It must run everyday. Let it idle for 2 hours trying to get the check engine light on, of course would not come on. Go to work next day 15 minutes in the light pops on. I am loosing my mind.

Response From Loren Champlain Sr Top Rated Answer

Ah, don't feel bad. At least you have some brain cells left to lose. Mine's been gone for years. LOL. Have a great Sunday.

Response From Jeff Norfolk

There should be some miss fire data in the scan tool if the light is coming on and running bad. I wounder if there is any miss fire codes present when the MAF code is there. MAF code could be a secondary code to the miss fire. At the same time the miss could be a secondary symptom due to the MAF With the miss fire data in the scan tool, you mechanic should be able to see if the miss is cylinder specific or just random. If it is cylinder specific then that really leaves three things that are causing it. Either way the MAF may be tripping a code due to the miss. It may be metering to compensate for the miss and going out of the desired range. Just a side note I have replaced injector #6 a handful of times for this very described problem. Obviously there was a diagnosis involved in these repairs, but #6 none the less each time.