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Home >> GMC >> 2014 >> Acadia SLE, AWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 33 (Data Communication System) >> Diagnostic Information and Procedures >> DTC U0400 - U05FF: Check U Code List For Exact Code >> Circuit/System Verification
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Circuit/System Verification

WARNING: This page is about a different car, the 2015 GMC Acadia, 2015 Chevrolet Traverse, and 2015 Buick Enclave. However, it is still accessible from the selected car via links, so may be relevant.
  1. Engine running for 10 seconds.
  2. Ignition ON, engine OFF, verify the DTC U0400-U05FF is not set.
    • If the DTC U0400-U05FF is set along with other DTCs set, diagnose all other codes first. Refer to Diagnostic Trouble Code (DTC) List - Vehicle .
    • If the DTC U0400-U05FF is set without other DTCs set, program the control module specified by the DTC descriptor. If the DTC resets, replace the appropriate control module.
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