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the pro's at a P1131 is that a bad O2? would that explain why my cat/exhaust STINK  thanks
#0009
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Originally posted by Goonz SVT:
the pro's at a P1131
is that a bad O2?
From TSB, it could be any of this.
HO2S-11 (Bank 1 Upper)- Lack of HO2S-11 Switch, Indicates Lean When an HO2S sensor indicates lean at the end of a test, the system is trying to correct for an over-lean condition. The code is set when the fuel control system no longer detects switching for a calibrated amount of time.
Electrical:
�· Short to VPWR or VREF in harness or HO2S
�· HO2S circuit shorted to Ground
�· Water in harness connector
�· Open circuit
�· Corrosion or poor mating terminals and wiring
�· Damaged HO2S
�· Damaged PCM (other DTCs should be present)
Fuel System:
�· Excessive fuel pressure (stuck fuel pressure regulator, restricted fuel return lines, etc.)
�· Leaking/contaminated fuel injectors or fuel pressure regulator
�· Low fuel pressure or running out of fuel (fuel pump concern, fuel supply line restrictions, low fuel level, etc.)
�· Vapor recovery system (stuck VMV, etc.)
Induction System:
�· MAF contamination
�· Air leaks between MAF and throttle plate
�· PCV system / Other vacuum leaks
�· Improperly seated engine oil dipstick
EGR System:
�· Leaking gasket
�· Stuck EGR valve / Leaking diaphragm or EVR
Base Engine:
�· Oil overfill
�· Incorrect cylinder compression
�· Exhaust leaks before or near the HO2S
�· Secondary air stuck on
Last edited by Tony2005; 08/28/05 11:50 PM.
"Always do the cheap and easy ones first."
1996 V6 ATX 96K miles
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omg! wtf! where do I start?!?
#0009
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Originally posted by Goonz SVT:
where do I start?!?
Always do the cheap and easy ones first.
Short to VPWR or VREF in harness or HO2S
�· Water in harness connector
�· Corrosion or poor mating terminals and wiring
Fuel System:
�· Low fuel pressure or running out of fuel (fuel pump concern, fuel supply line restrictions, low fuel level, etc.)
Induction System:
�· MAF contamination
�· Air leaks between MAF and throttle plate
�· PCV system / Other vacuum leaks
�· Improperly seated engine oil dipstick
EGR System:
�· Leaking gasket
�· Stuck EGR valve / Leaking diaphragm or EVR
Base Engine:
�· Oil overfill
�· Exhaust leaks before or near the HO2S
Last edited by Tony2005; 08/29/05 01:13 AM.
"Always do the cheap and easy ones first."
1996 V6 ATX 96K miles
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