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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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Trouble Ticket Help Requests for DTC P1131
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
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