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P0120 Diagnostic Trouble Code Discussion for September 2013

Throttle Position Sensor Circuit Malfunction

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Trouble Ticket Help Requests for DTC P0120
Help Request Posted
2006 Hummer H2 6.0L MIL Lamp on VIN: 5GRGN22U86
P0120: TP Sensor 1 Signal Performance. ... light diagnostic. Found dtc p0120 (T.P. sensor circuit). Also found that the harness to the throttle body has been replaced and looks good. Scoped both tps circuits. Tps 1 signal and reference voltages are good. Then I found that tps 2 reverence voltage ha...
September 12, 2013