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P0120 Diagnostic Trouble Code Discussion for August 2006

Throttle Position Sensor Circuit Malfunction

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Trouble Ticket Help Requests for DTC P0120
Help Request Posted
2003 GMC Sierra 3500 6.0L MIL Lamp on VIN: 1GDJC39U33
P0120: TP Sensor 1 Performance. Thanks for reading this post. Been have this problem with this truck for a little over a week. As you can see I tryed just about everything there is. When the truck acts up the computer goes into reduced power mode, which doesn't let the truck accelterate over...
August 29, 2006