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P1131 Diagnostic Trouble Code Discussion for September 2012

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
2004 Ford F-150 Heritage XL 5.4L Poor Idle Quality, MIL Lamp on VIN: 2FDPF17M64
P1131: bank ome lean codition. ... came in with a check engine light on and rough idle,plenty of power off idle,retreived code p1131 bank one running lean,the idle is not smooth and feels like an overall miss,the code was set at 17 miles per hour and 85 degrees by looking at pids i see a ni...
September 01, 2012
2002 Ford Escort ZX2 2.0L Poor Idle Quality, Check Engine Light VIN: 3FAFP11302
P1131: O2 Sensor Bank One Sensor One Indicates Lean. Vehicle came in with a rough idle and check engine light on. We cleaned the throttle body and that helped it Idle better. We could not find any other problem. Fuel pressure is 40 psi short term fuel trim is + or - 3% long term is 2%. I see the freeze frame sho...
September 24, 2012