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Home >> GMC >> 2006 >> Sierra 1500 HD, RWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 1329 (Hybrid Engine Electrical System (Hp2)) >> Diagnostic Information and Procedures >> DTC P0AFB >> Circuit/System Verification

Circuit/System Verification

WARNING: This page is about a different car, the 2009 GMC Sierra and 2009 Chevrolet Silverado. However, it is still accessible from the selected car via links, so may be relevant.
  1. Verify that no hybrid powertrain control module (HPCM) DTCs are set due to high battery voltage.
  2. Engine running, observe the scan tool ACCM High Battery Voltage parameter. The reading should be between 225 Volts and 380 Volts.
    • If greater than the specified range, replace the ACCM.
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