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Home › Acura › 2008 › TSX Standard › Repair and Diagnosis › Engine Performance › System › Advanced Diagnostics › DTC P0685: Engine Control Module (ECM)/Powertrain Control Module (PCM) Power Control Circuit Malfunction › Malfunction Threshold

Malfunction Threshold

The PGM-FI main relay (FI MAIN) is turned OFF before the ignition switch is turned OFF, and the ECM/PCM stops operating.