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P0642 Diagnostic Trouble Code Discussion for August 2008

Sensor Reference Voltage 1 Circuit Low

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Trouble Ticket Help Requests for DTC P0642
Help Request Posted
2004 Chevrolet Silverado 2500 HD 6.6L No Start, Hesitation, Misfire, MIL Lamp on VIN: 1GCHK242X4
P0642: 5-Volt Reference 1 Circuit Low Voltage. So far I have not reproduced the problem. Thinking about my codes and their order of importance to me, I'm thinking that I'm losing my 5 volt reference voltage at or within the fuel press sensor. The reason being that is 2 codes are saying low voltage and 1 fo...
August 01, 2008