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P0641 Diagnostic Trouble Code Discussion for September 2004

5-Volt Reference 1 Circuit Malfunction

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Trouble Ticket Help Requests for DTC P0641
Help Request Posted
1994 Oldsmobile 98 Regency 3.8L MIL Lamp on, DTC P0641 QDM ERROR VIN: 1G3HY52K8S
P0641: qdm error high. we installed a used trans check engine light is on checked bulletins ) possible a short in the internal wiring harness on the trans we installed the original wiring harness and all the solenoids from the used trans customer also went to the dealer to check the...
September 10, 2004