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P0131 Diagnostic Trouble Code Discussion for February 2005

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
1997 Chevrolet Blazer 4.3L Misfire, MIL Lamp on VIN: 1GNDT13WOV
P0131: Heated Oxygen Sensor (Bank 1 Sensor 1) Circuit Low Voltage. the engine show constent misfire on cyl. #3 has 150 compression has good spark have replaced fuel pressure reg. and return fuel line when truck came in it had 75# fuel pressure not sure how long customer drove like that replaceing return line fix high fuel pre...
February 01, 2005