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Home >> Chevrolet >> 2018 >> Traverse RS >> Repair and Diagnosis >> External Pages >> Different car >> Section 19 (Battery, Starting And Charging System) >> Diagnostic Information and Procedures >> DTC P0621 >> Circuit/System Verification

Circuit/System Verification

WARNING: This page is about a different car, the 2019 Chevrolet Traverse. However, it is still accessible from the selected car via links, so may be relevant.
  1. Ignition On.
  2. Verify a DTC is not set.
    • If a DTC sets 

      Refer to Circuit/System Testing.

    • Go to next step: If a DTC is not set 
  3. Operate the vehicle within the Conditions for Running the DTC. You may also operate the vehicle within the conditions that you observed from the Freeze Frame/Failure Records data.
  4. Verify a DTC does not set.
    • If the DTC sets 

      Refer to Circuit/System Testing.

    • Go to next step: If the DTC does not set 
  5. All OK.
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