P0624 OBD II Trouble Code Fuel Cap Lamp Control Circuit

How to easily diagnose, repair, and info on causes of a P0624 trouble code that indicates a detected malfunction with the fuel cap lamp control circuit.

Symptoms of P0624 OBD II Trouble Code

  • Diminished fuel efficiency
  • Evaporative emissions system deactivation
  • Other stored codes

Common Causes of P0624 OBD II Trouble Code

  • Faulty PCM
  • PCM programming error
  • Open or shorted fuel cap lamp control circuit
  • Defective, loose, or missing fuel cap
  • Failed fuel cap warning lamp bulb

Severity of P0624 OBD II Trouble Code

A stored code P0624 should be addressed with some urgency. A loose or missing fuel cap may result in fuel contamination in addition to permitting the release of harmful fuel vapors into the atmosphere.