P0131 Diagnostic Trouble Code Discussion for June 2005
Air Fuel Sensor (Bank 1 Sensor 1) Circuit Low Input (Lean Shift)
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| Help Request | Posted | |
| 1999 Chevrolet Express 3500 5.7L Hesitation, MIL Lamp on VIN: 1GBJG31RXX P0131: Heated Oxygen Sensor (Bank 1 Sensor 1) Circuit Low Voltage. When this symptom does finally happen the O2 sensors drop to about 40 mv and there is no throttle response.Also the long term fuel trim stays about 121-125.All sensors seem in spec except the O2's. I would think the LT fuel trim would start to rise but it does... |
June 07, 2005 |
