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DTC P0120 Step Action Values Yes No Schematic Reference:Engine Controls Schematics 1 Did you perform the Diagnostic System Check - - Go to Step 2 Go to Diagnostic System Check - Engine Controls 2 1. Turn OFF the ignition. 2. Remove the air inlet duct from the throttle body. 3. Disconnect the throttle body harness connector. 4. Connect the jumper wires between the throttle position (TP) sensor 1 terminals of the throttle 5. Turn ON the ignition, with the engine OFF. 6. Close the throttle blade by hand. 7. Observe the TP sensor 1 voltage with a scan tool. Is the TP sensor 1 voltage within the specified range? 0.37- 0.71 V Go to Step 5 Go to Step 3 3 1. Turn OFF the ignition. 2. Connect jumper wires between the TP sensor 2 terminals of the throttle body harness connector 3. Turn ON the ignition, with the engine OFF. 4. Close the throttle blade by hand. 5. Observe the TP sensor 2 voltage with a scan tool. Is the TP sensor 2 voltage within the specified range? 0.28- 0.81 V Go to Step 9 Go to Step 4 4 Is DTC U0107 also set? - Go to Diagnostic Trouble Code (DTC) List Go to Step 9 5 1. Open the throttle blade to wide open throttle (WOT) by hand. 2. Observe the TP sensor 1 voltage parameter on the scan tool. Is the TP sensor 1 voltage parameter more than the 4.51 V Go to Step 9 Go to Step 6
2004 Hummer H2 2004 ENGINE PERFORMANCE Engine Controls Diagnosis (DTC P0068 To DTC P0141/P0161) - 4.8L, 5.3L, and 6.0L - Hummer H2
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