The computer sees a fault in the circuit or operation of the vent valve. The driver may have trouble refuelling or see only the engine light.
Likely causes, most common first
- Faulty vent valve
- Dirt or blockage in the vent path
- Damaged wiring
- Clogged canister filter
Parts usually involved
- Vent valve
- Charcoal canister
- Valve connector
Test before you replace
Command the vent valve with a scan tool, check its wiring and confirm the vent path is clear.
General guidance for generic OBD2 codes. Always follow the maker's procedure for the car in front of you.