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Home >> GMC >> 2006 >> Sierra 1500 HD, RWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 936 (Engine Controls And Fuel - 6.6L (LMM) - DTC P02E0 To DTC P154A) >> DTC P0642 or P0643 >> Diagnostic Fault Information

Diagnostic Fault Information

WARNING: This page is about a different car, the 2007 GMC Sierra, 2007 GMC Cab & Chassis Sierra, 2007 Chevrolet Silverado, and 2007 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.
DTC P0642 or P0643

Circuit Short to Ground High Resistance Open Short to Voltage Signal Performance
Crankshaft 58 X - 5-Volt Reference P0642 P0335, P2453 P0335, P2453 P0341, P0401, P0643 -
Camshaft 4 X - 5-Volt Reference P0642 P0340 P0340 P0340, P0401, P0643 -
Intake Air Flow Valve P0642 P02E7 P02E8 P0401, P0643 -
Fuel Tank Level Sensor 2 P0642, P2067 P2068 P2068 P0643, P2068 -
EV Fan Sensor P0117, P011A,P0462, P0522, P0642 - P0526 P0118, P011A,P0455, P0533, P0643 -