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P0651 Diagnostic Trouble Code Discussion for March 2011

5-Volt Reference 2 Circuit Malfunction

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Trouble Ticket Help Requests for DTC P0651
Help Request Posted
2004 Pontiac Grand Prix GTP 3.8L Cuts out, MIL Lamp on VIN: 2G2WR52474
P0651: 5-Volt Reference 2 Circuit Malfunction. Car has codes PO651 & PO742. Baro & AC press sensors both have 5 volt reference. TCC release sensor will not release according to scanner.Unplug 10 pin at trans still shows not released.Also occasionally door locks lock & unlock when connecting &am...
March 01, 2011