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P0641 Diagnostic Trouble Code Discussion for March 2013

5-Volt Reference 1 Circuit Malfunction

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Trouble Ticket Help Requests for DTC P0641
Help Request Posted
2006 Buick Rendezvous CXL 3.5L 5 volt reference VIN: 3G5DB03L26
P0641: 5-Volt Reference 1 Circuit Malfunction. ... and die. Multiple codes- cleared engine started and idled rough and ran rich, checked data stream noticed Map was at 28.5 kpa and would eventually get to 19kpa. Disconnected and checked voltages at connector and found 10.5 volts at sensor. started engine w...
March 27, 2013