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Best Selling Genuine Mini O2 Sensors

  • We Stock the following top leading brands, including Denso, Delphi, NGK, Walker, Bosch
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We stock O2 Sensor parts for most Mini models, including Cooper, Cooper Countryman, Cooper Paceman.

Denso
2007 Mini Cooper Oxygen Sensor - Upstream 4 Cyl 1.6L Denso

P311-12D50E4    234-4457  New

Qty:
Denso Oxygen Sensor  Upstream
  • 4 Wire, Direct Fit, Heated, Wire Length: 24.45
  • O.E. Quality Replacement Sensor Non-Turbo; W10B16A Engine
  • OE Style
  • DENSO oxygen sensors are manufactured and tested to the strictest OE standards for unparalleled peformance; Each component is precision built for exact replacement, and a first time fit; This innovative line features DENSO's exclusive aluminum oxide trap layer, designed to protect the ceramic element from silicone and lead posining for improved engine performance, greater fuel efficiency, and unparalleled longevity; DENSO gives you the right part and the right fit, the first time.
Brand: Denso
Additional Fitment Information:
Vehicle Aspiration Block CC CID Engine Designation Position
2007 - Mini Cooper Naturally Aspirated L 1600 - W10B16A Upstream
Denso
2007 Mini Cooper Oxygen Sensor - Downstream 4 Cyl 1.6L Denso

P311-4872568    234-4488  New

Qty:
$93.31
Denso Oxygen Sensor  Downstream
  • 4 Wire, Direct Fit, Heated, Wire Length: 17.52
  • OE Style
  • DENSO oxygen sensors are manufactured and tested to the strictest OE standards for unparalleled peformance; Each component is precision built for exact replacement, and a first time fit; This innovative line features DENSO's exclusive aluminum oxide trap layer, designed to protect the ceramic element from silicone and lead posining for improved engine performance, greater fuel efficiency, and unparalleled longevity; DENSO gives you the right part and the right fit, the first time.
Brand: Denso
Additional Fitment Information:
Vehicle Aspiration Block CC CID Engine Designation Position
2007 - Mini Cooper Naturally Aspirated L 1598 - N12B16A Downstream
Denso
2007 Mini Cooper Oxygen Sensor - Downstream 4 Cyl 1.6L Denso

P311-4872568    234-4488  New

Qty:
$93.31
Denso Oxygen Sensor  Downstream
  • 4 Wire, Direct Fit, Heated, Wire Length: 17.52
  • O.E. Quality Replacement Sensor
  • OE Style
  • DENSO oxygen sensors are manufactured and tested to the strictest OE standards for unparalleled peformance; Each component is precision built for exact replacement, and a first time fit; This innovative line features DENSO's exclusive aluminum oxide trap layer, designed to protect the ceramic element from silicone and lead posining for improved engine performance, greater fuel efficiency, and unparalleled longevity; DENSO gives you the right part and the right fit, the first time.
Brand: Denso
Additional Fitment Information:
Vehicle Aspiration Block CC CID Engine Designation Position
2007 - Mini Cooper Naturally Aspirated L 1598 - N12B16A Downstream
Denso
2007 Mini Cooper Oxygen Sensor - Downstream 4 Cyl 1.6L Denso

P311-4872568    234-4488  New

Qty:
$93.31
Denso Oxygen Sensor  Downstream
  • 4 Wire, Direct Fit, Heated, Wire Length: 17.52
  • O.E. Quality Replacement Sensor Non-Turbo; N12B16A Engine
  • OE Style
  • DENSO oxygen sensors are manufactured and tested to the strictest OE standards for unparalleled peformance; Each component is precision built for exact replacement, and a first time fit; This innovative line features DENSO's exclusive aluminum oxide trap layer, designed to protect the ceramic element from silicone and lead posining for improved engine performance, greater fuel efficiency, and unparalleled longevity; DENSO gives you the right part and the right fit, the first time.
Brand: Denso
Additional Fitment Information:
Vehicle Aspiration Block CC CID Engine Designation Position
2007 - Mini Cooper Naturally Aspirated L 1598 - N12B16A Downstream
Denso
2007 Mini Cooper Oxygen Sensor - Downstream 4 Cyl 1.6L Denso

P311-4872568    234-4488  New

Qty:
$93.31
Denso Oxygen Sensor  Downstream
  • 4 Wire, Direct Fit, Heated, Wire Length: 17.52
  • O.E. Quality Replacement Sensor Turbo
  • OE Style
  • DENSO oxygen sensors are manufactured and tested to the strictest OE standards for unparalleled peformance; Each component is precision built for exact replacement, and a first time fit; This innovative line features DENSO's exclusive aluminum oxide trap layer, designed to protect the ceramic element from silicone and lead posining for improved engine performance, greater fuel efficiency, and unparalleled longevity; DENSO gives you the right part and the right fit, the first time.
Brand: Denso
Additional Fitment Information:
Vehicle Aspiration Block CC CID Position
2007 - Mini Cooper Turbocharged L 1598 - Downstream
Denso
2009 Mini Cooper Oxygen Sensor - Downstream 4 Cyl 1.6L Denso

P311-4872568    234-4488  New

Qty:
$93.31
Denso Oxygen Sensor  Downstream
  • 4 Wire, Direct Fit, Heated, Wire Length: 17.52
  • O.E. Quality Replacement Sensor Non-Turbo
  • OE Style
  • DENSO oxygen sensors are manufactured and tested to the strictest OE standards for unparalleled peformance; Each component is precision built for exact replacement, and a first time fit; This innovative line features DENSO's exclusive aluminum oxide trap layer, designed to protect the ceramic element from silicone and lead posining for improved engine performance, greater fuel efficiency, and unparalleled longevity; DENSO gives you the right part and the right fit, the first time.
Brand: Denso
Additional Fitment Information:
Vehicle Aspiration Block CC CID Position
2009 - Mini Cooper Naturally Aspirated L 1598 - Downstream
Denso
2011 Mini Cooper Oxygen Sensor - Downstream 4 Cyl 1.6L Denso

P311-4872568    234-4488  New

Qty:
$93.31
Denso Oxygen Sensor  Downstream
  • 4 Wire, Direct Fit, Heated, Wire Length: 17.52
  • O.E. Quality Replacement Sensor Turbo; Excludes John Cooper Works
  • OE Style
  • DENSO oxygen sensors are manufactured and tested to the strictest OE standards for unparalleled peformance; Each component is precision built for exact replacement, and a first time fit; This innovative line features DENSO's exclusive aluminum oxide trap layer, designed to protect the ceramic element from silicone and lead posining for improved engine performance, greater fuel efficiency, and unparalleled longevity; DENSO gives you the right part and the right fit, the first time.
Brand: Denso
Additional Fitment Information:
Vehicle Aspiration Block CC CID Engine Designation Position
2011 - Mini Cooper Turbocharged L 1598 - N18B16A Downstream
Denso
2011 Mini Cooper Oxygen Sensor - Downstream 4 Cyl 1.6L Denso

P311-4872568    234-4488  New

Qty:
$93.31
Denso Oxygen Sensor  Downstream
  • 4 Wire, Direct Fit, Heated, Wire Length: 17.52
  • O.E. Quality Replacement Sensor Turbo; John Cooper Works
  • OE Style
  • DENSO oxygen sensors are manufactured and tested to the strictest OE standards for unparalleled peformance; Each component is precision built for exact replacement, and a first time fit; This innovative line features DENSO's exclusive aluminum oxide trap layer, designed to protect the ceramic element from silicone and lead posining for improved engine performance, greater fuel efficiency, and unparalleled longevity; DENSO gives you the right part and the right fit, the first time.
Brand: Denso
Additional Fitment Information:
Vehicle Aspiration Block CC CID Engine Designation Position
2011 - Mini Cooper Turbocharged L 1598 - N14B16C Downstream
Denso
2015 Mini Cooper Countryman Oxygen Sensor - Downstream 4 Cyl 1.6L Denso

P311-4872568    234-4488  New

Qty:
$93.31
Denso Oxygen Sensor  Downstream
  • 4 Wire, Direct Fit, Heated, Wire Length: 17.52
  • O.E. Quality Replacement Sensor -
  • OE Style
  • DENSO oxygen sensors are manufactured and tested to the strictest OE standards for unparalleled peformance; Each component is precision built for exact replacement, and a first time fit; This innovative line features DENSO's exclusive aluminum oxide trap layer, designed to protect the ceramic element from silicone and lead posining for improved engine performance, greater fuel efficiency, and unparalleled longevity; DENSO gives you the right part and the right fit, the first time.
Brand: Denso
Additional Fitment Information:
Vehicle Aspiration Block CC CID Position
2015 - Mini Cooper Countryman Turbocharged L 1598 98 Downstream
Denso
2015 Mini Cooper Oxygen Sensor - Downstream 4 Cyl 1.6L Denso

P311-4872568    234-4488  New

Qty:
$93.31
Denso Oxygen Sensor  Downstream
  • 4 Wire, Direct Fit, Heated, Wire Length: 17.52
  • O.E. Quality Replacement Sensor Turbo; N18B16A Engine
  • OE Style
  • DENSO oxygen sensors are manufactured and tested to the strictest OE standards for unparalleled peformance; Each component is precision built for exact replacement, and a first time fit; This innovative line features DENSO's exclusive aluminum oxide trap layer, designed to protect the ceramic element from silicone and lead posining for improved engine performance, greater fuel efficiency, and unparalleled longevity; DENSO gives you the right part and the right fit, the first time.
Brand: Denso
Additional Fitment Information:
Vehicle Aspiration Block CC CID Engine Designation Position
2015 - Mini Cooper Turbocharged L 1598 - N18B16A Downstream
Delphi
2007 Mini Cooper Oxygen Sensor - Front Delphi

P311-41FF918    ES11080  New

Qty:
$133.59
Delphi Oxygen Sensor  Front
  • Oxygen Sensor
  • Harness Length: 685 mm Wrench Size: 7/8 in.
  • Product Attributes:
    • Connector Type: Square-5 Blade
    • Harness Length: 685 Mm
    • Inspection Interval: 100000 Miles
    • Number of Wires: 5
    • OE Type/Exact Fit: Exact Fit
    • Thread: 18 X 1.5 Mm
    • Type/Series: A/f Ratio
    • Wrench Size: 7/8 In.
  • OE connectors and wire lengths within 3 inches of OE specifications; Unique sensor coatings to resist contamination; Long lasting reliable operation
Brand: Delphi
Additional Fitment Information:
Vehicle Aspiration Position
2007 - Mini Cooper Turbocharged Front
NGK
2002 Mini Cooper Oxygen Sensor - Downstream 4 Cyl 1.6L NGK

P311-0FD3F72    25648  New

Qty:
$122.17
NGK Oxygen Sensor  Downstream
  • OE MFR: NTK
  • OE Type Oxygen Sensor
  • Product Attributes:
    • Mounting Type: Threaded
    • Sensor Type: Heated
    • Thread Diameter: 18.000
    • Universal Or Specific Fit: Specific
    • Wire Quantity: 4
    • Wiring Harness Length: 24.5000
Brand: NGK
Additional Fitment Information:
Vehicle Block CC CID Position
2002 - Mini Cooper L 1600 - Downstream
NGK
2002 Mini Cooper Oxygen Sensor - Upstream 4 Cyl 1.6L NGK

P311-0FD3F72    25648  New

Qty:
$122.17
NGK Oxygen Sensor  Upstream
  • OE MFR: NTK
  • OE Type Oxygen Sensor
  • Product Attributes:
    • Mounting Type: Threaded
    • Sensor Type: Heated
    • Thread Diameter: 18.000
    • Universal Or Specific Fit: Specific
    • Wire Quantity: 4
    • Wiring Harness Length: 24.5000
Brand: NGK
Additional Fitment Information:
Vehicle Block CC CID Position
2002 - Mini Cooper L 1600 - Upstream
NGK
2007 Mini Cooper Oxygen Sensor - Downstream 4 Cyl 1.6L NGK

P311-41BEE33    25198  New

Qty:
$64.66
NGK Oxygen Sensor  Downstream
  • OE MFR: NTK
  • OE Type Oxygen Sensor
  • Product Attributes:
    • Mounting Type: Threaded
    • Sensor Type: Heated
    • Thread Diameter: 18.000
    • Universal Or Specific Fit: Specific
    • Wire Quantity: 4
    • Wiring Harness Length: 17.5000
Brand: NGK
Additional Fitment Information:
Vehicle Aspiration Block CC CID Engine Designation Position
2007 - Mini Cooper Naturally Aspirated L 1598 - N12B16A Downstream
Walker
2011 Mini Cooper Countryman Oxygen Sensor - Upstream 4 Cyl 1.6L Walker

P311-5E8CFBC    250-25087  New

Qty:
$161.91
Walker Oxygen Sensor  Upstream
  • Walker
Brand: Walker
Additional Fitment Information:
Vehicle Aspiration Block CC CID Engine Designation Fuel Delivery Type Fuel Type Position
2011 - Mini Cooper Countryman Turbocharged L 1598 - N18B16A FI GAS Upstream
Bosch
2007 Mini Cooper Oxygen Sensor - Downstream 4 Cyl 1.6L Bosch

P311-5CAF121    15379  New

Qty:
$159.77
Bosch Oxygen Sensor  Downstream
  • OE Style Oxygen Sensor
  • Product Attributes:
    • : 18.4
    • Automotive Color / Finish: Steel
    • Connector Gender: Male
    • Connector Shape: Male Spade
    • Housing Material: Metal
    • Mounting Type: Threaded
    • Sensor Type: Heated
    • Thread Diameter: 18
    • Universal Or Specific Fit: Specific
    • Wire Quantity: 4
Brand: Bosch
Additional Fitment Information:
Vehicle Aspiration Block Body CC CID Position Submodel
2007 - Mini Cooper Naturally Aspirated L Hatchback 1598 - Downstream Base
Bosch
2007 Mini Cooper Oxygen Sensor - Upstream 4 Cyl 1.6L Bosch

P311-35A168B    17112  New

Qty:
$154.19
Bosch Oxygen Sensor  Upstream
  • OE Style Oxygen Sensor
  • Product Attributes:
    • Automotive Color / Finish: Steel
    • Connector Shape: Male Spade
    • Housing Material: Metal
    • Sensor Type: Heated
    • Thread Diameter: 18
    • Universal Or Specific Fit: Specific
    • Wire Quantity: 5
Brand: Bosch
Additional Fitment Information:
Vehicle Aspiration Block Body CC CID Position Submodel
2007 - Mini Cooper Turbocharged L Hatchback 1598 - Upstream S
Bosch
2007 Mini Cooper Oxygen Sensor - Upstream 4 Cyl 1.6L Bosch

P311-35A168B    17112  New

Qty:
$154.19
Bosch Oxygen Sensor  Upstream
  • Bosch is the OE equivalent supplier
  • OE Style Oxygen Sensor
  • Product Attributes:
    • Automotive Color / Finish: Steel
    • Connector Shape: Male Spade
    • Housing Material: Metal
    • Sensor Type: Heated
    • Thread Diameter: 18
    • Universal Or Specific Fit: Specific
    • Wire Quantity: 5
Brand: Bosch
Additional Fitment Information:
Vehicle Aspiration Block Body CC CID Position Submodel
2007 - Mini Cooper Turbocharged L Convertible 1598 - Upstream S
Bosch
2007 Mini Cooper Oxygen Sensor - Upstream 4 Cyl 1.6L Bosch

P311-2345B7E    17217  New

Qty:
$133.62
Bosch Oxygen Sensor  Upstream
  • OE Style Oxygen Sensor
  • Product Attributes:
    • Automotive Color / Finish: Steel
    • Connector Shape: Male Spade
    • Housing Material: Metal
    • Sensor Type: Heated
    • Thread Diameter: 18
    • Universal Or Specific Fit: Specific
    • Wire Quantity: 5
Brand: Bosch
Additional Fitment Information:
Vehicle Aspiration Block Body CC CID Position Submodel
2007 - Mini Cooper Naturally Aspirated L Hatchback 1598 - Upstream Base
Bosch
2007 Mini Cooper Oxygen Sensor - Upstream 4 Cyl 1.6L Bosch

P311-2345B7E    17217  New

Qty:
$133.62
Bosch Oxygen Sensor  Upstream
  • Bosch is the OE equivalent supplier
  • OE Style Oxygen Sensor
  • Product Attributes:
    • Automotive Color / Finish: Steel
    • Connector Shape: Male Spade
    • Housing Material: Metal
    • Sensor Type: Heated
    • Thread Diameter: 18
    • Universal Or Specific Fit: Specific
    • Wire Quantity: 5
Brand: Bosch
Additional Fitment Information:
Vehicle Aspiration Block Body CC CID Position
2007 - Mini Cooper Naturally Aspirated L Convertible 1598 - Upstream

Latest Mini Repair and O2 Sensor Installation Advice

CarJunky AutoAdvice

Downstream O2 sensors work?

Showing 4 out of 33 Posts | Show 29 Hidden Posts
Question From jfls45 on Downstream O2 sensors work?

2002 Dodge Dakota, 3.9L V6, 109K Miles

Downstream O2 Sensor questions
I ran a OBD Scan program from my netbook today and observed the following:
Can someone who knows how O2 sensors work explain which downstream sensor is working correctly, see the attached photo.
This photo shows the O2 sensors after the vehicle has been warmed up to normal operating temp. The downstream are the two on the bottom.


Response From Hammer Time

Are we sure this truck even has 4 sensors. Everything I'm seeing says it only has one downstream sensor unless it's California. The poster is in PA.

Response From jfls45

I'm curious to why you say everything says there isn't 4 sensors, did you look at the photo in original post. you can clearly see 4 sensors.


it's a 02 Dakota 3.9L V6, has the two mini-cats, an upstream and downstream on each mini-cat, these two pipes come together and go into the main cat. then to the muffler... the photo I provided clearly shows 4 sensors if you look at the title window above each sensor. now we got that cleared up, yes i ran the vehicle for long time, its is my daily driver, i run it back and forth to work everyday, 16 miles to work one way, so it is getting heated up. but not thrown one code.

I appreciate all of your help and will hook laptop back up soon and log about 20 minutes worth of driving to post up here to look at.

thanks

Response From Hammer Time

No, what i see is a window that shows 4 graphs that are labeled as 4 different sensors which doesn't mean much of anything. Unless this is a California emissions certified vehicle, it only has one downstream sensor.

Response From jfls45

I tried to copy and paste data stream from excel file but it jumbled all together. is there a way to attach an excel file to this?

Response From Hammer Time

It doesn't apply the line returns when you do that but you can go back in and edit them in. I was trying to do that for you when you deleted the content.

Response From jfls45

this data is idling with the pvc hose unplugged, creating a vacuum leak.

32:03.1 Malfunction Indicator Lamp (MIL) Status 0
32:03.2 Number of Emission-Related DTCs 0
32:03.3 Misfire Monitoring Support 1
32:03.4 Fuel System Monitoring Support 1
32:03.5 Comprehensive Component Monitoring Support 1
32:03.6 Misfire Monitoring Completed 1
32:03.7 Fuel System Monitoring Completed 1
32:03.8 Comprehensive Component Monitoring Completed 1
32:03.9 Catalyst Monitoring Support 1
32:04.0 Heated Catalyst Monitoring Support 0
32:04.1 Evaporative System Monitoring Support 1
32:04.2 Secondary Air System Monitoring Support 0
32:04.3 A/C System Refrigerant Monitoring Support 0
32:04.4 Oxygen Sensor Monitoring Support 1
32:04.5 Oxygen Sensor Heater Monitoring Support 1
32:04.6 EGR System Monitoring Support 0
32:04.7 Catalyst Monitoring Completed 1
32:04.8 Heated Catalyst Monitoring Completed 1
32:04.9 Evaporative System Monitoring Completed 1
32:05.1 Secondary Air System Monitoring Completed 1
32:05.1 A/C System Refrigerant Monitoring Completed 1
32:05.2 Oxygen Sensor Monitoring Completed 1
32:05.3 Oxygen Sensor Heater Monitoring Completed 1
32:05.4 EGR System Monitoring Completed 1
32:05.5 Calculated Engine Load 5.882352941 %
32:05.6 Engine Coolant Temperature 199.4 F
32:06.1 Intake Manifold Absolute Pressure 4.496169878 psi
32:06.3 Engine RPM 991.5 rpm
32:06.3 Vehicle Speed Sensor 0 mph
32:06.4 Ignition Timing Advance for #1 Cylinder 10.5
32:06.5 Intake Air Temperature 158 F
32:06.6 Throttle Position 11.37254902 %
32:06.7 Oxygen Sensor Present (Bank 1 Sensor 1) 1
32:06.8 Oxygen Sensor Present (Bank 1 Sensor 2) 1
32:06.9 Oxygen Sensor Present (Bank 2 Sensor 1) 1
32:07.0 Oxygen Sensor Present (Bank 2 Sensor 2) 1
32:07.1 Oxygen Sensor Voltage (Bank 1 Sensor 1) 0.28 V
32:07.2 O2 Sensor Short Term Fuel Trim (Bank 1 Sensor 1) 2.34375 %
32:07.3 Oxygen Sensor Voltage (Bank 1 Sensor 2) 0.76 V
32:07.4 O2 Sensor Short Term Fuel Trim (Bank 1 Sensor 2) 0 %
32:07.5 Oxygen Sensor Voltage (Bank 2 Sensor 1) 0.84 V
32:07.6 O2 Sensor Short Term Fuel Trim (Bank 2 Sensor 1) -2.34375 %
32:07.7 Oxygen Sensor Voltage (Bank 2 Sensor 2) 0.82 V
32:07.8 O2 Sensor Short Term Fuel Trim (Bank 2 Sensor 2) 0 %
32:07.9 Malfunction Indicator Lamp (MIL) Status 0
32:08.0 Number of Emission-Related DTCs 0
32:08.1 Misfire Monitoring Support 1
32:08.2 Fuel System Monitoring Support 1
32:08.3 Comprehensive Component Monitoring Support 1
32:08.4 Misfire Monitoring Completed 1
32:08.5 Fuel System Monitoring Completed 1
32:08.6 Comprehensive Component Monitoring Completed 1
32:08.7 Catalyst Monitoring Support 1
32:08.9 Heated Catalyst Monitoring Support 0
32:09.0 Evaporative System Monitoring Support 1
32:09.1 Secondary Air System Monitoring Support 0
32:09.2 A/C System Refrigerant Monitoring Support 0
32:09.3 Oxygen Sensor Monitoring Support 1
32:09.4 Oxygen Sensor Heater Monitoring Support 1
32:09.5 EGR System Monitoring Support 0
32:09.6 Catalyst Monitoring Completed 1
32:09.7 Heated Catalyst Monitoring Completed 1
32:09.8 Evaporative System Monitoring Completed 1
32:09.9 Secondary Air System Monitoring Completed 1
32:10.0 A/C System Refrigerant Monitoring Completed 1
32:10.2 Oxygen Sensor Monitoring Completed 1
32:10.2 Oxygen Sensor Heater Monitoring Completed 1
32:10.3 EGR System Monitoring Completed 1
32:10.4 Calculated Engine Load 5.882352941 %
32:10.5 Engine Coolant Temperature 199.4 F
32:11.0 Intake Manifold Absolute Pressure 4.35113214 psi
32:11.1 Engine RPM 984.75 rpm
32:11.2 Vehicle Speed Sensor 0 mph
32:11.3 Ignition Timing Advance for #1 Cylinder 8
32:11.4 Intake Air Temperature 159.8 F
32:11.6 Throttle Position 11.37254902 %
32:11.6 Oxygen Sensor Present (Bank 1 Sensor 1) 1
32:11.7 Oxygen Sensor Present (Bank 1 Sensor 2) 1
32:11.9 Oxygen Sensor Present (Bank 2 Sensor 1) 1
32:11.9 Oxygen Sensor Present (Bank 2 Sensor 2) 1
32:12.0 Oxygen Sensor Voltage (Bank 1 Sensor 1) 0.6 V
32:12.1 O2 Sensor Short Term Fuel Trim (Bank 1 Sensor 1) -0.78125 %
32:12.2 Oxygen Sensor Voltage (Bank 1 Sensor 2) 0.76 V
32:12.3 O2 Sensor Short Term Fuel Trim (Bank 1 Sensor 2) 0 %
32:12.4 Oxygen Sensor Voltage (Bank 2 Sensor 1) 0.08 V
32:12.6 O2 Sensor Short Term Fuel Trim (Bank 2 Sensor 1) 4.6875 %
32:12.6 Oxygen Sensor Voltage (Bank 2 Sensor 2) 0.12 V
32:12.7 O2 Sensor Short Term Fuel Trim (Bank 2 Sensor 2) 0 %
32:12.8 Malfunction Indicator Lamp (MIL) Status 0
32:12.9 Number of Emission-Related DTCs 0
32:13.0 Misfire Monitoring Support 1
32:13.2 Fuel System Monitoring Support 1
32:13.3 Comprehensive Component Monitoring Support 1
32:13.4 Misfire Monitoring Completed 1
32:13.5 Fuel System Monitoring Completed 1
32:13.6 Comprehensive Component Monitoring Completed 1
32:13.7 Catalyst Monitoring Support 1
32:13.8 Heated Catalyst Monitoring Support 0
32:13.9 Evaporative System Monitoring Support 1
32:14.0 Secondary Air System Monitoring Support 0
32:14.1 A/C System Refrigerant Monitoring Support 0
32:14.2 Oxygen Sensor Monitoring Support 1
32:14.3 Oxygen Sensor Heater Monitoring Support 1
32:14.4 EGR System Monitoring Support 0
32:14.5 Catalyst Monitoring Completed 1
32:14.6 Heated Catalyst Monitoring Completed 1
32:14.7 Evaporative System Monitoring Completed 1
32:14.8 Secondary Air System Monitoring Completed 1
32:14.9 A/C System Refrigerant Monitoring Completed 1
32:15.1 Oxygen Sensor Monitoring Completed 1
32:15.2 Oxygen Sensor Heater Monitoring Completed 1
32:15.3 EGR System Monitoring Completed 1
32:15.3 Calculated Engine Load 5.882352941 %
32:15.4 Engine Coolant Temperature 199.4 F
32:16.0 Intake Manifold Absolute Pressure 4.35113214 psi
32:16.1 Engine RPM 986.75 rpm
32:16.2 Vehicle Speed Sensor 0 mph
32:16.3 Ignition Timing Advance for #1 Cylinder 8.5
32:16.4 Intake Air Temperature 159.8 F
32:16.5 Throttle Position 11.37254902 %
32:16.5 Oxygen Sensor Present (Bank 1 Sensor 1) 1
32:16.7 Oxygen Sensor Present (Bank 1 Sensor 2) 1
32:16.8 Oxygen Sensor Present (Bank 2 Sensor 1) 1
32:16.8 Oxygen Sensor Present (Bank 2 Sensor 2) 1
32:17.0 Oxygen Sensor Voltage (Bank 1 Sensor 1) 0.06 V
32:17.1 O2 Sensor Short Term Fuel Trim (Bank 1 Sensor 1) 4.6875 %
32:17.2 Oxygen Sensor Voltage (Bank 1 Sensor 2) 0.76 V
32:17.3 O2 Sensor Short Term Fuel Trim (Bank 1 Sensor 2) 0 %
32:17.3 Oxygen Sensor Voltage (Bank 2 Sensor 1) 0.8 V
32:17.4 O2 Sensor Short Term Fuel Trim (Bank 2 Sensor 1) -3.125 %
32:17.5 Oxygen Sensor Voltage (Bank 2 Sensor 2) 0.74 V
32:17.6 O2 Sensor Short Term Fuel Trim (Bank 2 Sensor 2) 0 %
32:17.7 Malfunction Indicator Lamp (MIL) Status 0
32:17.8 Number of Emission-Related DTCs 0
32:18.0 Misfire Monitoring Support 1
32:18.0 Fuel System Monitoring Support 1
32:18.2 Comprehensive Component Monitoring Support 1
32:18.3 Misfire Monitoring Completed 1
32:18.4 Fuel System Monitoring Completed 1
32:18.5 Comprehensive Component Monitoring Completed 1
32:18.6 Catalyst Monitoring Support 1
32:18.7 Heated Catalyst Monitoring Support 0
32:18.8 Evaporative System Monitoring Support 1
32:18.9 Secondary Air System Monitoring Support 0
32:19.0 A/C System Refrigerant Monitoring Support 0
32:19.1 Oxygen Sensor Monitoring Support 1
32:19.2 Oxygen Sensor Heater Monitoring Support 1
32:19.4 EGR System Monitoring Support 0
32:19.5 Catalyst Monitoring Completed 1
32:19.6 Heated Catalyst Monitoring Completed 1
32:19.7 Evaporative System Monitoring Completed 1
32:19.8 Secondary Air System Monitoring Completed 1
32:19.9 A/C System Refrigerant Monitoring Completed 1
32:20.0 Oxygen Sensor Monitoring Completed 1
32:20.1 Oxygen Sensor Heater Monitoring Completed 1
32:20.2 EGR System Monitoring Completed 1
32:20.3 Calculated Engine Load 5.882352941 %
32:20.4 Engine Coolant Temperature 199.4 F
32:20.9 Intake Manifold Absolute Pressure 4.35113214 psi
32:21.0 Engine RPM 978.5 rpm
32:21.1 Vehicle Speed Sensor 0 mph
32:21.2 Ignition Timing Advance for #1 Cylinder 7
32:21.3 Intake Air Temperature 159.8 F
32:21.4 Throttle Position 11.37254902 %
32:21.5 Oxygen Sensor Present (Bank 1 Sensor 1) 1
32:21.6 Oxygen Sensor Present (Bank 1 Sensor 2) 1
32:21.8 Oxygen Sensor Present (Bank 2 Sensor 1) 1
32:21.9 Oxygen Sensor Present (Bank 2 Sensor 2) 1
32:22.0 Oxygen Sensor Voltage (Bank 1 Sensor 1) 0.8 V
32:22.1 O2 Sensor Short Term Fuel Trim (Bank 1 Sensor 1) -3.125 %
32:22.2 Oxygen Sensor Voltage (Bank 1 Sensor 2) 0.76 V
32:22.3 O2 Sensor Short Term Fuel Trim (Bank 1 Sensor 2) 0 %
32:22.4 Oxygen Sensor Voltage (Bank 2 Sensor 1) 0.84 V
32:22.5 O2 Sensor Short Term Fuel Trim (Bank 2 Sensor 1) -2.34375 %
32:22.6 Oxygen Sensor Voltage (Bank 2 Sensor 2) 0.78 V
32:22.7 O2 Sensor Short Term Fuel Trim (Bank 2 Sensor 2) 0 %

Response From Hammer Time

Yeah, there is. Don't try to post so much junk.

Response From jfls45

so not only did we argue about how many O2 sensors I really had I pretty much got no useful feedback from anyone on this forum...

and there is a way to change from the Calif emissions to non-calif emissions...

Response From Sidom


I pretty much got no useful feedback from anyone on this forum...
I don't think that is a fair statement at all...... Taking my posts out the picture cuz I'll grant there isn't alot of useful info there, I've gone back thru this thread and see a lot of useful info from the other mods... These guys donate their time and knowledge for free and to come in here and say that is bs. You started this thread completely wrong....Rather than stating the problem you had in the 1st post, up front, you start asking about a system that is going to have nothing to do with the driveability problem you are having.... You come in later and spring that little nugget of info on us. So yea that turned what could've been straight forward problem and answer thread into this twisted mess..... Once again, I'm not talking about myself but you have no clue who you are insulting............

Response From Hammer Time

I'll put you in for a refund if your not happy with the free service.

Response From jfls45

Ill send a bill for my time with posting pics and data.

Response From Hammer Time

The value of that data is a wash. You've got the magic software program so you shouldn't need us anyway............LOL

Response From Discretesignals

I am sitting here looking at generic OBD2 data and nothing really stands out as an indication that something is wrong. Looks like two snap shots were taken at idle with the engine warming up.

You stated the problem your having occurs at when the engine is under load. Your not going to get too much from the OBD2 side if there is a misfire going on. Can't really tell from the vacuum leak you created if the O2 sensor responds or not because we are only seeing one frame of data.


Oops thread got locked...just noticed.

Response From jfls45

18:42.5 Malfunction Indicator Lamp (MIL) Status 0
18:42.6 Number of Emission-Related DTCs 0
18:42.7 Misfire Monitoring Support 1
18:42.8 Fuel System Monitoring Support 1
18:42.9 Comprehensive Component Monitoring Support 1
18:43.0 Misfire Monitoring Completed 1
18:43.1 Fuel System Monitoring Completed 1
18:43.2 Comprehensive Component Monitoring Completed 1
18:43.3 Catalyst Monitoring Support 1
18:43.4 Heated Catalyst Monitoring Support 0
18:43.5 Evaporative System Monitoring Support 1
18:43.6 Secondary Air System Monitoring Support 0
18:43.7 A/C System Refrigerant Monitoring Support 0
18:43.8 Oxygen Sensor Monitoring Support 1
18:43.9 Oxygen Sensor Heater Monitoring Support 1
18:44.0 EGR System Monitoring Support 0
18:44.1 Catalyst Monitoring Completed 1
18:44.2 Heated Catalyst Monitoring Completed 1
18:44.3 Evaporative System Monitoring Completed 1
18:44.4 Secondary Air System Monitoring Completed 1
18:44.5 A/C System Refrigerant Monitoring Completed 1
18:44.6 Oxygen Sensor Monitoring Completed 1
18:44.8 Oxygen Sensor Heater Monitoring Completed 1
18:44.9 EGR System Monitoring Completed 1
18:45.0 Calculated Engine Load 44.70588235 %
18:45.1 Engine Coolant Temperature 197.6 F
18:45.6 Intake Manifold Absolute Pressure 13.63354737 psi
18:45.7 Engine RPM 2562.25 rpm
18:45.8 Vehicle Speed Sensor 32.31130198 mph
18:45.9 Ignition Timing Advance for #1 Cylinder 15.5
18:46.0 Intake Air Temperature 109.4 F
18:46.1 Throttle Position 49.80392157 %
18:46.2 Oxygen Sensor Present (Bank 1 Sensor 1) 1
18:46.3 Oxygen Sensor Present (Bank 1 Sensor 2) 1
18:46.4 Oxygen Sensor Present (Bank 2 Sensor 1) 1
18:46.5 Oxygen Sensor Present (Bank 2 Sensor 2) 1
18:46.6 Oxygen Sensor Voltage (Bank 1 Sensor 1) 0.78 V
18:46.7 O2 Sensor Short Term Fuel Trim (Bank 1 Sensor 1) -2.34375 %
18:46.8 Oxygen Sensor Voltage (Bank 1 Sensor 2) 0.5 V
18:46.9 O2 Sensor Short Term Fuel Trim (Bank 1 Sensor 2) 0 %
18:47.0 Oxygen Sensor Voltage (Bank 2 Sensor 1) 0.72 V
18:47.1 O2 Sensor Short Term Fuel Trim (Bank 2 Sensor 1) -3.125 %
18:47.2 Oxygen Sensor Voltage (Bank 2 Sensor 2) 0.34 V
18:47.3 O2 Sensor Short Term Fuel Trim (Bank 2 Sensor 2) 0 %

Response From jfls45

19:31.7 Malfunction Indicator Lamp (MIL) Status 0
19:32.0 Misfire Monitoring Support 1
19:32.2 Fuel System Monitoring Support 1
19:32.3 Comprehensive Component Monitoring Support 1
19:32.5 Misfire Monitoring Completed 1
19:32.6 Fuel System Monitoring Completed 1
19:32.8 Comprehensive Component Monitoring Completed 1
19:32.9 Catalyst Monitoring Support 1
19:33.1 Oxygen Sensor Monitoring Support 1
19:33.2 Oxygen Sensor Heater Monitoring Support 1
19:33.3 Oxygen Sensor Monitoring Completed 1
19:33.5 Oxygen Sensor Heater Monitoring Completed 1
19:33.6 Calculated Engine Load 4.313725 %
19:33.7 Engine Coolant Temperature 161.6 F
19:34.3 Intake Manifold Absolute Pressure 5.221359 psi
19:34.4 Engine RPM 689 rpm
19:34.5 Vehicle Speed Sensor 0 mph
19:34.6 Ignition Timing Advance for #1 Cylinder 14
19:34.7 Intake Air Temperature 131 F
19:34.9 Throttle Position 11.37255 %
19:35.0 Oxygen Sensor Present (Bank 1 Sensor 1) 1
19:35.1 Oxygen Sensor Present (Bank 1 Sensor 2) 1
19:35.2 Oxygen Sensor Present (Bank 2 Sensor 1) 1
19:35.3 Oxygen Sensor Present (Bank 2 Sensor 2) 1
19:35.4 Oxygen Sensor Voltage (Bank 1 Sensor 1) 0.76 V
19:35.5 O2 Sensor Short Term Fuel Trim (Bank 1 Sensor 1) -3.125 %
19:35.6 Oxygen Sensor Voltage (Bank 1 Sensor 2) 0.16 V
19:35.7 Oxygen Sensor Voltage (Bank 2 Sensor 1) 0.8 V
19:35.8 O2 Sensor Short Term Fuel Trim (Bank 2 Sensor 1) -3.90625 %
19:35.9 Oxygen Sensor Voltage (Bank 2 Sensor 2) 0.82 V

Response From Sidom

Well 16 miles should do it but if your gonna run it to get a datastream, I would make sure at least half of it is at freeway speeds.
Before you take off, check and make sure all the moniters have run or passed.....If the O2 moniter is incomplete, the cat moniter won't run....

We appreciate the pictures to see what you got but......damn dude you didn't have to pull out the tranny for us....

I actually have an 02 Dakota but it's got the small V/8 so we can't get a good baseline from that........

Response From jfls45

Four (4) Sensors.

This is Bank 1 Sensor 2:


This is Bank 2 Sensor 1 and 2:



And yes there is a transmission in it now... these pictures were taken when the tranny was being rebuilt.

Response From Hammer Time


You have California emissions.

Response From Tom Greenleaf

I don't frequent new car dealers but MA and CA have had same specs for many years and says so on window stickers. Can't say for sure but I suspect many auto makers just comply to highest standard for many destinations.

MA + CA have done this for ages,

T

Response From Hammer Time

There are only 2 emissions standards. They are "Federal Compliant" and "California and Federal compliant". There are no cars specifically built for Massachusetts or any other state besides California.

I'm not sure what the whole goal of this thread is. The downstream sensors are Cat monitors only and serve no other purpose. They have no input or control over computer decisions for mixture or anything else. If you are not getting a Cat efficiency code, then none of this really matters at all in terms of engine performance.

You can have a blocked or restricted cat than can effect performance but the readings on B2S2 don't reflect that.

Response From Tom Greenleaf

It's not a different requirement just that it must meet CA standards to be sold here new anyway. I don't think it applies to used vehicles like CA where alterations are or were once required.

Nothing near me but I'll try to find a window sticker on a new car and take a pic.............

Just looked at a '97 of my own. Says underhood meets EPA standards for California and I know that was sold new to upstate, NY??!!

Dunno - that's how things are marked here not a MA sticker but must meet CA standards?

I'll see if I can Google out that confusion............

Tom

Response From jfls45 Top Rated Answer

ok, so I live in PA, the Carfax report says it was originally sold as a corporate vehicle right here in PA. Do you know why it has Calif emissions? and could I redo the exhaust without the mini-cats and have just two sensors? What would I have to do besides the wiring harness, change the computer too or could it be done with dealer programming tool?


What are your suggestions?

Response From Hammer Time

No, you can't change it. It is what it is. It was built with a package to be California compliant and that's the way it will always be.

Response From Sidom

DS is right....There just isn't enough info here to even guess at it...

Under all the right conditions it would look like one cat is bad.....But if you haven't run it long enough to fire off both cats then it could just be a case of one of them being to cold...

You should also check to see if all the moniters have run and passed. If you have any incomplete ones then other ones won't run until they run & pass...

If you have an incomplete O2 moniter then you may have a cat code looming to set as soon as the O2 moniter runs & passes....

Response From Discretesignals

Are you getting a P0430 code because Bank 2 catalyst isn't cleaning the exhaust. What rpm was the engine at?

Bank 1 appears that it is doing something and the cat on that side is working. Bank 2 sensor is working because it is fluctuating. You can tell if Bank 1 is responsive by stabbing the gas pedal a few times to richen up the exhaust and see if the O2 responds.

Response From jfls45

So are you leaning toward the downstream sensor bank 2 sensor 2 (bottom right graph) indicating the mini-catalyc converter is bad? Would this cause stutter or poor performance when running in overdrive and a load on the motor?

Response From Discretesignals

Bank 2 catalyst isn't cleaning because the rear sensor pattern is mimicking the front O2 sensor. The Bank 1 side appears to be working.


Were you driving the vehicle at the time the stuttering was occurring when this snap shot was taken?

You want to resolve your drive-ability problem first before condemning the cat. A cat this isn't cleaning won't necessarily cause a drive-ability problem unless it is plugging up the exhaust.

Does your program have the option of viewing misfire data?

Response From jfls45

it checks to see if the misfire check circuit ran which it does, but i get no codes indicating a misfire.

Response From Discretesignals

There might not be enough misfires occurring to cause the light to come on. The misfire monitor is active, but you might not be able to view current misfire pids with your program.

If the engine feels like it is skipping under load. That is usually caused by ignition secondary issues such as spark plug wires breaking down. How are the plugs, wires, cap, and rotor?

Misfires due to an ignition problem will reek havok with the catalyst because the unburnt fuel from the misfiring will cause the catalyst to overheat if there are enough of them.

Response From jfls45

plugs wires cap and rotor and coil all brand new motor has 109K on it. did compression check all about 180PSI

Response From Discretesignals

What are your long and short term fuel trims for both banks at the time of the stutter and loss of power? Can you snap shot a data list and post it up on here when the problem is occurring?

Response From jfls45

I am getting no codes at all.

o2 sensors on a 93 ford minivan

Showing 2 out of 2 Posts
Question From chino117 on o2 sensors on a 93 ford minivan

please help my father owns a 93 ford mini van and does not know the correct procedure to remove the o2 sensors, or the spark plugs and the distributor cap rotor i live in n.y and he lives in fl. therefore i cannot look at it and i'm not familar with the problem.we are very thankfull for any help most high in christ bless you'all.

Response From Tom Greenleaf Top Rated Answer

Hi Israel,

First off - good luck with learning this trade. It's changed a lot since I was the student. You will need to know exactly what vehicle you are dealing with. Ford and others have joined forces with other companies completely and just Ford has sold vehicles that are really Nissans or Mazdas with just a few cosmetic changes. The VIN will tell about all.

From there you can find out what is in there exactly. O2 sensors generally unscrew like a spark plug but can give a fight with corrosion. How they plug in to wiring can be different. Just witnessed a Lexus getting O2 sensors and it required removing the carpeting!! No joke - a customer would think you were crazy but that's where it hooked up!

Good luck - I'll help where I can,

T

CHRYSLER TOWN AND COUNTRY-PLEASE HELP QUICKLY!!!

Showing 2 out of 9 Posts | Show 7 Hidden Posts
Question From szamocka on CHRYSLER TOWN AND COUNTRY-PLEASE HELP QUICKLY!!!

HI! I HAVE A 1998 CHRYSLER TOWN AND COUNTRY. I JUST GOT DONE CHANGING THE SPARK PLUGS IN MY 98 CHRYSLER MINI VAN,3.8 ,I HAD TO TAKE OFF THE INTAKE MANIFOLDS ETC! IT'S ALL BACK NOW BUT IT IS IN FAST IDOL! OR STUCK IN FULL THROTOL!!?? WHAT IS GOIN ON? i rechecked everithing !!" PLEASE HELP!!!

Response From Tom Greenleaf

Did you replace manifold gaskets? If no pinched wiring seems like a vacuum leak so far or maybe if torquing manifold(s) etc., broke/cracked something??

T

Response From szamocka

HI! AND THANKS FOR RESPONDING! I HAD RETITENED ALL THE BOLTS AND IT HELPED! BUT I THINK IT STILL IDOLS TO FAST! ITS OK IN D, BUT IN PARK IT IDOLS OVER 1200 RPM! AND AS IT WORMS UP EVEN FASTER! I PUT NEW GASKETS AND DID NOT USED ANY SILICON,BUT WAS ONE IN THE PACKAGE! I WAS TOLD NOT TO USE IT?? ON THE INTAKE!? IS THERE WAY TO SET THE IDOL SPEED LOWER? SINCE I PUT NEW WIRES AND PLUGS IT RUNS BETTER! IT WAS NEVER CHANGED! WHAT IS NORMAL?ALSO I DID NOT WANT TO TORQUET TO MUCH!

Response From Tom Greenleaf

Many parts of things especially engine you need to tight things in order by specified torque. If not done that way can be trouble especially on engines using alloy/aluminum parts!

The manifold gaskets may or may not be interchangeable side to side/front and rear. Plain don't know for this car but if so problems are near certain. New gaskets should have said or included any sealer/silicone if needed,

T

Response From autotecha

TOM, I'm glad you said sequence ( I meant to say that with using a torque wrench....)

Response From Tom Greenleaf

Thanks for clarifying. In sequence using torque wrench is much better than saying in order. Old all cast iron you could get away with murder but sure wouldn't trust the aluminum/alloys - engine, pumps, wheels and all!

T

Response From Discretesignals Top Rated Answer

Don't use silicone on the upper intake plenum. Silicone will kill an O2 sensor faster than you can say, "Opps did I do that?" Only time you use gasket maker, which is O2 sensor safe, on one of those is when you are doing lower intake gaskets. You use a little bit of gasket maker on the china walls in the corners.

Don't adjust the throttle cam stop to lower idle speed. If you have a high idle, you have done something wrong and you need to figure it out instead of compromising for it by changing something that isn't intended to be messed with.

Response From samg.

Did you tweak your throttle cable?

Response From autotecha

X2 Like he said it sounds like a vaccuum leak. Do you have a torque wrench to torque it down?

dodge check engine light code PO161

Showing 2 out of 2 Posts
Question From Uwm51b on dodge check engine light code PO161

2001 dodge durango w/ 4.7 4wd.
check engine light came on. the computer stated error
code was po161 (throttle senson). chilton book and
online both say that code is for a different sensor?

could the computer be right, the readout clearly stated
throttle sensor??

Response From Hammer Time Top Rated Answer

The computer doesn't tell you what the code means. It only supplies a code number. It was the code read that you were using that identified it incorrectly.

That code is for a bad heater in the O/2 sensor on the downstream side of bank 2

The one you need to change is in the right side exhaust pipe after the mini converter and before the main converter.

2003 Ford Explorer 4.0L 114,550 miles, code # P2195 need some help

Showing 2 out of 6 Posts | Show 4 Hidden Posts
Question From mes4888 on 2003 Ford Explorer 4.0L 114,550 miles, code # P2195 need some help

Hey all,

My POS SUV is giving me this code, it is a bank 1 O2 sensor 1 stuck lean. This is the passenger side. Now here are the symptoms:

- When i come to a hard stop the motor will drag down then rev up and chug forward.
- When cruising at any speed (40-75) the car will start chugging, no change in RPM seen, but will keep doing this till i let off and get back on the throttle, almost like it is loading up and then clearing out
- At times i will push the accelerator and the RPMs will rise but lacks power and suddenly i will get power, like a cylinder wasn't firing.
- and this is unrelated but whats the best to check and test door sensors, i just had my door ajar light come on and stay on, and trust me i have checked every door and gate lock pawl and assembly.


So i have done some research and come up with this to check:
- Intake manifold leak
- Broken/damaged vacuum hose
- Bad brake booster (really?)
- Damage to air intake hose
- Exhaust leak

Now if any techs could point me in the right directions and some good methods of testing for the above i would really appreciate it. Another question for the testing aspect, would some starting fluid sprayed around the intake manifold gasket, while running, find my problem or is this just a trick that i should keep to the 2 strokes in the shop?


Thanks,
Matt

Response From ishootu

Hello,

just wanted to know if you have your situation corrected yet? I have an 03 with the 4.6 liter engine. same DTC code. Most of the time this car runs excellent, smooth idle, smooth accelleration. I will get the chugging at 50-65 mph. or after hard braking. I replaced the intake manifold gaskets and checked all of the vacuum hoses carefully since they all come off to do the job. no issues with hoses. I did notice some oily residue from the back side of the throttle body down into the top part of the intake manifold. Normal for a car with 110,000 miles? I am thinking maybe my O2 sensor is fouled from running rich for a while so I am going to try that next.
Any other input would be appreciated.

Thanks

David

Response From Hammer Time

If you would like some help with your car, you should start a new question. We don't like to address more than one vehicle in a single thread.

Response From ishootu

Sorry, and thanks. I am a newbie to this board.

Response From Sidom

Got some good advise going on already I'll just add a couple more points....

I'm not sure what tools you have available but if your scanner can give you a data stream & freeze frame data on the code, that would really help you narrow your search..... You want to look the fuel trims... In a nutshell this is what the comp is doing to compensate for a problem. A rule of thumb +20% will set a lean code, -20% will set a rich code.

1st thing would be to test the O2 with propane enrichment to make sure it's working. Add propane and it should go full rich then full lean within 100ms and then start switching.

Look at the freeze frame data and see what the speed was when the code set. If it was idle or low speed then your on the right track with a vacuum leak. If it was at high speed then you are looking at a fuel supply problem, i.e plugged fuel filter, weak pump, etc.

One other quick note if the code is setting in open loop on start up look real careful at the plenum gasket.........

Response From nickwarner Top Rated Answer

You could use the starting fluid but I would recommend something less volatile like carb cleaner. Do this on a cold engine, watch what you spray it on and don't get too crazy with it. No need to make a mini Hiroshima in the garage, and you would look pretty goofy with no eyebrows. As to your confusion about a brake booster being able to cause this, remember that it uses engine vacuum to give power assist to your brakes. If it failed it would leak vacuum as surely as an intake gasket would. Have you tried first just listening to the running engine for the vacuum leak? If bad enough you would be able to hear it.