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P0151 Diagnostic Trouble Code Discussion for June 2005

Air Fuel Sensor (Bank 2 Sensor 1) Circuit Low Input (Lean Shift)


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Trouble Ticket Help Requests for DTC P0151
Help Request Posted
1999 Chevrolet Express 3500 5.7L Hesitation, MIL Lamp on VIN: 1GBJG31RXX
P0151: Heated Oxygen Sensor (Bank 2 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
1999 Chevrolet Express 3500 5.7L Hesitation, MIL Lamp on VIN: 1GBJG31RXX
P0151: Heated Oxygen Sensor (Bank 2 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