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Home >> Cadillac >> 2011 >> Escalade EXT >> Repair and Diagnosis >> External Pages >> Different car >> Section 1220 (Hybrid Engine Control System) >> Diagnostic Information and Procedures >> DTC P0A1D >> Circuit/System Testing
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Circuit/System Testing

WARNING: This page is about a different car, the 2008 GMC Yukon and 2008 Chevrolet Tahoe. However, it is still accessible from the selected car via links, so may be relevant.
  1. Inspect for any communication U-code DTCs.
  2. Ignition OFF, disconnect the 12V battery. Refer to Battery Negative Cable Disconnection and Connection .
  3. Wait 2 minutes.
  4. Reconnect the 12V battery. Refer to Battery Negative Cable Disconnection and Connection .
  5. Ignition ON, retest for DTC P0A1D.
    • If the DTC resets, program the PIM with the latest software version and recheck for DTCs. If the DTC resets after programming or if the PIM already contains the latest software version, replace the PIM.
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