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P0641 Diagnostic Trouble Code Discussion for January 2012

5-Volt Reference 1 Circuit Malfunction

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Trouble Ticket Help Requests for DTC P0641
Help Request Posted
2007 Chevrolet Tahoe LTZ 5.3L No Start, MIL Lamp on VIN: 1GNFK13047
P0641: 5-Volt Reference 1 Circuit Malfunction. ... start then dies problem. Scan showed 6 codes so I erased to see what showed up when retrying to start. Gets a hard p0641 for the reference voltage. I looked on alldata and followed the tree and while in the engine area I noticed a few wires looked pinched ...
January 26, 2012