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P1131 Diagnostic Trouble Code Discussion for June 2009

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
2000 Ford F-150 Lariat 4.6L Hesitation, Surge, Poor Fuel Economy VIN: 1FTRX17W5Y
P1131: Lack of HO2 sensor B1S1 switch indicates lean. HELP!!! Hope one of you Ford guru's have seen something like this. As I stated in the repair history, vehicle was first brought in a little over a year and a half ago with a PCM wire shorted at the accumulator. Wire was repaired and used computer installed at ...
June 01, 2009
1999 Mazda 626 ES 2.0L MIL Lamp on VIN: 1YVGF22C2X
P1131: Heated Oxygen Sensor (Bank 1 Sensor 1) Indicates A/F Ratio Too Lean. ... codes similar to this one and the freeze frame data isn't showing the condition. This particular vehicle customer said had the check engine lite on for months and just went out. I did find p1131 stored but freeze frame showed LTFT = -1.6% and STFT = 33% it...
June 11, 2009