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Home >> GMC >> 2022 >> Hummer EV >> Repair and Diagnosis >> Electrical >> Charging Systems >> Plug-In Charging System >> Diagnostic Information and Procedures >> DTC P300B >> Circuit/System Verification
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Circuit/System Verification

  1. Vehicle On - Service Mode
  2. Verify DTC U02CE, U05CF is not set.
    • Go to next step: If none of the DTCs are set 
  3. Advise the customer to report a problem with the DC fast charge station.