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P1131 Diagnostic Trouble Code Discussion for October 2006

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 Contour GL 2.0L Hesitation, MIL Lamp on VIN: 1FAFP6633W
P1131: HO2 Indicates Lean. ... light p1131 O2 lean. checked everything i can think of Fuel Pressure at idle is 27 goes to 35 given throttle, Vacuum is 21 inch. Cleaned MAF sensor had known good one tried dint make a difference. The car also hitches like a misfire but mo msfire codes.Bar...
October 06, 2006