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P1131 Diagnostic Trouble Code Discussion for December 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
2002 Ford E-350 Econoline 5.4L Misfire, MIL Lamp on VIN: 1FTSS34L22
P1131: lean o2. ... p0305,p0306,p0308 miss fire codes, p0316 lean missfire on startup. this van really runs half way decent, has slight engine missfire on acceleration. cold start and cold running are great other than t...
December 01, 2008
2001 Ford Escape XLT 3.0L Poor Idle Quality, Misfire, MIL Lamp on VIN: 1FMCU04101
P1131: Ho2s11 indicates lean. Hi guys, Thanks for this "look see" at my problem. This car has the following odd symptoms. Engine idling: open loop, #1 misfire. After accelorating: different speeds, misfire dissappears when closed loop is achieved(about). After stopping, misfire re...
December 04, 2008