P0131 Diagnostic Trouble Code Discussion for September 2007
Air Fuel Sensor (Bank 1 Sensor 1) Circuit Low Input (Lean Shift)
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| Help Request | Posted | |
| 2002 Buick LeSabre Custom 3.8L MIL Lamp on VIN: 1G4HP54KX2 P0131: Heated Oxygen Sensor (Bank 1 Sensor 1) Circuit Low Voltage. ... and codes p0171 lean, and p0131 O2 sensor voltage low. Found severe dirt on MAF wire and very dirty air filter. Changed air and fuel filters and cleaned MAF wire. Car now has plenty of power, so I clear codes and let it go. One week later, MIL on again wit... |
September 11, 2007 |
