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Home >> Saab >> 2006 >> 9-7X 4.2i >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - 4.2L - DTC P0446 To P2120 >> DTC P1682 >> Circuit Description
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Circuit Description

The Throttle Actuator Control (TAC) System uses an ignition voltage supply separate from the Powertrain Control Module (PCM) supply. If the PCM detects a voltage difference between the 2 circuits, this Diagnostic Trouble Code (DTC) will set.

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