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P1131 Diagnostic Trouble Code Discussion for September 2011

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
2002 Ford Mustang 3.8L Poor Idle Quality, Stall VIN: 1FAFP40482
P1131: Lean code/ global only. Car dont want to run or idle in open loop and all values seem to be wrong. When vehicle goes into closed loop will idle fine and values return to normal except stft 1 & 2 are way up at 33%. Getting a koer code p0505. Went through flow chart and determined ...
September 14, 2011