The computer found a problem in the system that holds fuel vapour. The driver usually sees only the engine light and may smell fuel.
Likely causes, most common first
- Loose or worn fuel cap
- Faulty purge or vent valve
- Cracked EVAP hose
- Damaged charcoal canister
Parts usually involved
- Fuel cap
- Purge valve
- Vent valve
- Charcoal canister
Test before you replace
Inspect the cap and hoses, then smoke test the EVAP system and command the valves with a scan tool.
General guidance for generic OBD2 codes. Always follow the maker's procedure for the car in front of you.