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Home >> Chevrolet >> 2013 >> Sonic RS, Automatic Trans >> Repair and Diagnosis >> External Pages >> Different car >> Section 320 (Battery, Charging System And Starting System) >> Diagnostic Information and Procedures >> DTC P0621 >> Circuit/System Verification

Circuit/System Verification

WARNING: This page is about a different car, the 2012 Chevrolet Sonic. However, it is still accessible from the selected car via links, so may be relevant.

Engine running, observe the following scan tool ECM control circuit status parameters.

Each parameter should read OK or Not Run.