P1640 Diagnostic Trouble Code Discussion for May 2009
Output Driver 1 Voltage High Input
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| Help Request | Posted | |
| 1995 Buick Riviera 3.8L MIL Lamp on VIN: 1G4GD2211S P1640: QDM 1 failure. Hello all. Hopefully some one can point me in the right direction. The two codes that keep returning seem to be at the same time. Performed flow chart testing for both codes but only the EGR test was definitive in failing the part but the EGR has been replaced... |
May 05, 2009 |
