What does code P0497 mean?

Q: What does code P0497 mean?

Evaporative Emission System Low Purge Flow. P0497 means the powertrain control module (PCM) commanded the evaporative emission (EVAP) purge valve to open and flow fuel vapor into the intake, but the resulting change in fuel tank pressure or purge flow was smaller than expected. The computer is not reporting a leak; it is reporting that the purge system is not moving vapor when it should.

DTC codes / P04xx · Auxiliary emission controls / P0497

P0497Evaporative Emission System Low Purge Flow

P0497 means the powertrain control module (PCM) commanded the evaporative emission (EVAP) purge valve to open and flow fuel vapor into the intake, but the resulting change in fuel tank pressure or purge flow was smaller than expected. The computer is not reporting a leak; it is reporting that the purge system is not moving vapor when it should.

SystemPowertrain

Code typeGeneric (all makes)

SeverityLow

Fix difficultyIntermediate

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.