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Home >> Hummer >> 2008 >> H2 4D Utility Wagon >> Repair and Diagnosis >> External Pages >> Different car >> Section 222 (Hybrid Engine Control System) >> Diagnostic Information and Procedures >> DTC P1AC6 or P1AC7 >> Diagnostic Fault Information

Diagnostic Fault Information

WARNING: This page is about a different car, the 2008 GMC Yukon and 2008 Chevrolet Tahoe. However, it is still accessible from the selected car via links, so may be relevant.
Circuit Short to Ground Open/High Resistance Short to Voltage Signal Performance
5-Volt Reference Circuit (ECM) ECM P0641, P0651 / HPCM P1AC6 ECM P0335 / HPCM P1AC6 ECM P0651, P2135 / HPCM P1AC6 -
CKP Sensor Signal Circuit1 ECM P0335 / HPCM P1AC6 ECM P0335 / HPCM P1AC7 ECM P0335 / HPCM P1AC6 ECM P0336 / HPCM P1AC7
Low Reference Circuit1 - ECM P0335 / HPCM P1AC7 ECM P0335 / HPCM P1AC6 -
1 ECM DTCs will not set with an open circuit condition between the circuit splice and the HPCM.
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