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P1131 Diagnostic Trouble Code Discussion for February 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
1998 Ford Expedition Eddie Bauer 5.4L Poor Idle Quality VIN: 1FMPU18L1W
P1131: Lack of HO2S B1S1 switch sensor indicates lean. The vehicle came in with a "Check Engine" light on. Old friends of the Bosses'. This code was a, "Lean B1S1". The boss talks the person into buying plugs and boots and we'll install them. No other complaints at this time,(Very Important Later)....
February 07, 2012