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P1640 Diagnostic Trouble Code Discussion for November 2019

Output Driver 1 Voltage High Input

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Trouble Ticket Help Requests for DTC P1640
Help Request Posted
1995 Buick Regal Limited 3.8L MIL Lamp on VIN: 2G4WD52LXS
P1640: Qdm 1 failure. Code p1640 ( qdm 1 failure. Test evap purge valve and it ok. Test power and ground for tcc enable solenoid and it ok. Has anyone have this problem before
November 08, 2019