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Home >> Honda >> 2021 >> Insight EX >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System - Advanced Diagnostics (1 Of 2) >> Advanced Diagnostics >> DTC P04CD >> Possible Cause
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Possible Cause

NOTE: The causes shown may not be a complete list of all potential problems, and it is possible that there may be other causes.
  • Fuel fill door opener switch FUEL REQ SW line short to power
  • Fuel fill door opener switch stuck on
  • PCM internal circuit failure