What does code P2409 mean?

Q: What does code P2409 mean?

Fuel Cap Sensor/Switch Circuit Range/Performance. P2409 indicates that the powertrain control module (PCM) has detected an out-of-range or performance fault in the fuel cap sensor or switch circuit, which is part of the evaporative emission (EVAP) system. The PCM monitors the fuel cap sensor signal to verify that the cap is properly sealed and that the circuit behaves as expected under key-on and running conditions.

DTC codes / P24xx · Auxiliary emission controls / P2409

P2409Fuel Cap Sensor/Switch Circuit Range/Performance

P2409 indicates that the powertrain control module (PCM) has detected an out-of-range or performance fault in the fuel cap sensor or switch circuit, which is part of the evaporative emission (EVAP) system. The PCM monitors the fuel cap sensor signal to verify that the cap is properly sealed and that the circuit behaves as expected under key-on and running conditions.

SystemPowertrain

Code typeGeneric (all makes)

SeverityLow

Fix difficultyDIY

AreaAuxiliary emission controls

Guidance is general and written for all OBD-II vehicles. Exact tests and values vary by model, so confirm the fault before replacing parts.