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Home >> Pontiac >> 2009 >> Vibe Base, 1.8 8, Automatic >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System & Fuel System - 1.8L (Lay) - DTC P0441 To DTC P2A00 >> DTC P0657 >> Circuit/System Description

Circuit/System Description

The PCM performs continuous self checks of all internal circuits. The PCM provides ignition positive voltage to the throttle actuator control (TAC) motor on circuit 1. DTC P0657 sets when the powertrain control module (PCM) has determined that the control module has an internal fault in the ignition voltage supply circuit 1.

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