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P0120 Diagnostic Trouble Code Discussion for April 2014

Throttle Position Sensor Circuit Malfunction


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Trouble Ticket Help Requests for DTC P0120
Help Request Posted
2004 Hummer H2 6.0L MIL Lamp on, Limp mode VIN: 5GRGN23404
P0120: TP Sensor 1 Signal Performance. ... in while in limp mode. Found codes p0120 and p2135. Cleared codes and it ran fine. Vehicle has been back 4 times with the same issue and everytime i find myself just throwing parts at it (see related repair history). All parts replaced were ac delco parts....
April 30, 2014