P0497 code meaning
EVAP System Low Purge Flow
Powertrain system Generic code P04xx codes Check engine light
What P0497 means
The evaporative emission (EVAP) system stores fuel vapour from the tank in a charcoal canister; a purge valve lets the engine draw it off, and a vent valve opens the canister to fresh air. P0497 is the counterpart of P0496: the module purges but sees too little or no purge flow, judged indirectly from fuel trim, idle control or tank vacuum – CARB requires missing purge flow to be detected. Code-specific use is documented only by Land Rover (5.0-litre V8) and in a GM fault group for systems with a sealed tank (Volt, ELR); standard GM and Ford systems use other codes, such as P0455. The canister is then not purged and saturates.
P0497 at a glance
- Check engine lightYes, usually on
- Emissions testCan fail
- Limp modeNot expected
- Repair difficultyMedium, DIY possible
- Typical labor0.3 to 2 hours
- Clears after repairAfter a drive cycle
Symptoms of P0497
- Check engine light on
- Fuel smell around the car
- Fuel nozzle clicks off early
Common causes of P0497
- Most likelyPurge valve stuck closed, does not open
- PossiblePurge line off, kinked or blocked (check valve sticking)
- PossibleCanister or vent filter blocked (e.g. after overfilling)
- Less likelyVent valve stuck closed
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
EVAP purge valvePurge lineCharcoal canisterEngine control module
What each part of P0497 means
| P | Powertrain system: engine, fuel system, ignition, emissions and transmission. |
| 0 | Generic code: it means the same on every make (SAE standard). |
| 4 | Area: auxiliary emission controls (catalytic converter, EGR, EVAP). |
| 97 | The exact fault in that area. |
What to do next
- Note P0497 and any other codes stored with it: several codes together often point to one cause.
- Check for loose connectors and damaged wiring around the parts the code names.
- Check open recalls for your car: some faults are fixed for free by the dealer. Enter your VIN.
- Clear the code only after the repair. If it comes back, the fault is still there.
Buying a used car? Scan it for stored codes before you pay. A recently cleared memory can hide a problem.
Questions about P0497
What does P0497 mean?
P0497 means "EVAP System Low Purge Flow". The evaporative emission (EVAP) system stores fuel vapour from the tank in a charcoal canister; a purge valve lets the engine draw it off, and a vent valve opens the canister to fresh air. It is a generic code, so it means the same on every make.
Is it safe to drive with P0497?
Usually yes, for a short time, if the check engine light is steady and the car drives normally. If the light flashes or the car runs badly, stop and have it checked.
Will P0497 fail an emissions test?
Yes, it can. P0497 is emissions-related, so most inspection programs fail a car while it is stored or while the check engine light is on.
How hard is P0497 to fix?
Difficulty: medium. A typical repair takes 0.3 to 2 hours of work. A careful DIY repair is possible with basic tools and a scanner.
Will P0497 clear itself after the repair?
After the repair the car has to complete a drive cycle (a mix of city and highway driving) before the test runs again. Until then the readiness monitor shows "not ready", which can fail an inspection.