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P0131 Diagnostic Trouble Code Discussion for July 2006

Air Fuel Sensor (Bank 1 Sensor 1) Circuit Low Input (Lean Shift)

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Trouble Ticket Help Requests for DTC P0131
Help Request Posted
1999 Chevrolet Malibu 3.1L Poor Idle Quality, Hesitation, Surge, Cuts out, Stall, MIL Lamp on VIN: 1G1ND52J9X
P0131: O2S-11 (Bank 1 Sensor 1) Circuit Low Voltage. The car came in on Friday with an Ho2s code. Replaced the o2 sensor, cleared the MIL and that car acted better. It came back yesterday with codes po131 & po1133 and the car was running like crap. I have power in the 4 prong connector in a dark brown wire. ...
July 19, 2006