P1131 Diagnostic Trouble Code Discussion for October 2008
Heated Oxygen Sensor (Bank 1 Sensor 1) Indicates A/F Ratio Too Lean
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| Help Request | Posted | |
| 1997 Ford Expedition Eddie Bauer 5.4L MIL Lamp on VIN: 1FMEU17L7V ... vehicle.I have 2 retutning codes: p1131, and p1151: both indicating banks 1 & 2 are lean. I have smoke tested the intake and all vacuum lines to no avail. All test ok, and have replaced all worn boots and plastic lines. I... |
October 11, 2008 | |
| 2002 Ford Focus ZX3 2.0L MIL Lamp on VIN: 3FAFP31332 P1131: ho2s11 sensor indicates lean. i am lost as to why this code is reaccuring when the fuel trims are good. also noticed will not go into closed loop. |
October 16, 2008 | |
| 2002 Ford Focus ZX3 2.0L MIL Lamp on VIN: 3FAFP31332 P1131: ho2s11 sensor indicates lean. i am lost as to why this code is reaccuring when the fuel trims are good. also noticed will not go into closed loop. |
October 17, 2008 | |
| 2000 Ford Expedition XLT 5.4L Poor Idle Quality, MIL Lamp on VIN: 1FMPU18C5Y Hello, this vehicle runs extrely poor at idle when cold. I have Searhed for vac leaks with propane and come up with nothing. As soon as it is warm runs like a champ. Idle is good and performance is good. When cold it tries to idle up, and the LT trims stay at ... |
October 31, 2008 |
