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Home >> Cadillac >> 2018 >> CT6 Plug-In >> Repair and Diagnosis >> Accessories & Equipment >> Anti-Theft Systems >> Power Door Lock System And Release Systems >> Diagnostic Information and Procedures >> DTC P04B6 >> Circuit/System Verification
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Circuit/System Verification

  1. Vehicle in Service Mode.
  2. Verify the scan tool Fuel Door Position parameter changes between Open and Closed when opening and closing the fuel filler door.
    • Go to next step: If the parameter changes 
  3. All OK.