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P0120 Diagnostic Trouble Code Discussion for December 2006

Throttle Position Sensor Circuit Malfunction

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Trouble Ticket Help Requests for DTC P0120
Help Request Posted
2003 Chevrolet Silverado 2500 6.0L MIL Lamp on VIN: 1GCHC29U33
P0120: TP Sensor 1 Performance. ... Vehicle came in with MIL on and a P0120. Vehicle would not go over 40 mph. This vehicle does not have a throttle cable. It is equipt with a "Throttle Control Actuator". Scanned vehicle and found TPS at 18% and 1.14 volts at idle. If you would sweep...
December 11, 2006