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Home >> GMC >> 2019 >> Canyon SL >> Repair and Diagnosis >> Electrical >> Charging Systems >> 12 V Starting And Charging >> Diagnostic Information And Procedures >> DTC P0621 >> Circuit/System Verification
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Circuit/System Verification

  1. 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.
  2. Verify the DTC does not set.
    • If the DTC sets 

      Refer to Circuit/System Testing.

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