P1131 Diagnostic Trouble Code Discussion for November 2010
Heated Oxygen Sensor (Bank 1 Sensor 1) Indicates A/F Ratio Too Lean
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| Help Request | Posted | |
| 2002 Ford F-150 XL 5.4L Poor Idle Quality, MIL Lamp on VIN: 2FTRX18L52 P1131: o2 sensor indicates lean bank 1. I posted for this truck a few months ago, I closer to fixing it now. This truck is running lean, short term fuel trim is maxing out at 54%! The truck does run better when I disconnect the MAF. Fuel pressure is good at 32psi and jumping to 40psi with snap throt... |
November 05, 2010 | |
| 2001 Ford Mustang GT 4.6L Poor Idle Quality, lean VIN: 1FAFP45X21 P1131: 02 lean. Hello all ford guys, I have a 01 mustang gt with a 4.6. Car came in for a rough idle and low power problem after the customer installed own rario and had to jumstart car. I check and no data line run to radio. Car is running lean at idle and will intermitent l... |
November 11, 2010 | |
| 2001 Ford Mustang GT 4.6L Poor Idle Quality, lean VIN: 1FAFP45X21 P1131: 02 lean. Hello all ford guys, I have a 01 mustang gt with a 4.6. Car came in for a rough idle and low power problem after the customer installed own rario and had to jumstart car. I check and no data line run to radio. Car is running lean at idle and will intermitent l... |
November 12, 2010 | |
| 2004 Alfa Romeo 156 JTS Sele 2.0L Poor Idle Quality, MIL Lamp on VIN: ZAR9320000 P1131: Lamda 1 signal upstream plausibility. Cleaned contacts for Lambda 1 and 2, problem came back after 2 weeks. Replaced Lambda 1, problem came back after 1 week. Please help. Thank you |
November 15, 2010 | |
| 1999 Ford F-150 5.4L Poor Idle Quality, Surge, Stall VIN: 1FTRF17Z5X P1131: Indicates o2 sensor b1s1lean. ... told him he needed a mass airflow sensor for a P0171 lean code he had. He said he replaced the mass airflow sensor and relized it made no real difference and brought it to me. There is no codes pending or present at this time and the engine is idling rough... |
November 29, 2010 |
