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Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 555 (Starting System) >> Diagnostic Tests >> DTC P0620: Pcm Detects That The PWM Signal On The Generator Field Duty Cycle Signal Circuit Is Not Within The Expected Range >> Action Taken When the DTC Sets

Action Taken When the DTC Sets

WARNING: This page is about a different car, the 2003 Buick Regal, 2003 Buick Century, 2002 Buick Regal, and 2002 Buick Century. However, it is still accessible from the selected car via links, so may be relevant.

The PCM stores the DTC information into memory when the diagnostic runs and fails. The malfunction indicator lamp (MIL) will not illuminate. The PCM records the operating conditions at the time the diagnostic fails. The PCM stores this information in the Failure Records.

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