What does code P0455 mean?
P0455 means there is a large leak in the EVAP system, or no flow can be built up in it. Often the cause is simple: the fuel cap wasn't closed properly, or left off, after filling up.
Why does code P0455 appear?
- The fuel cap is loose or missing.
- An EVAP hose has come off or split.
- The purge valve is stuck open.
- The charcoal canister is faulty or cracked.
What can you safely check for P0455?
- Check the fuel cap: it should sit properly and be turned until it clicks. If its rubber seal is cracked, fit a new cap made for your car.
- Check whether you can smell fuel near the tank or under the car. If you can, keep any flame away.
Is it safe to drive with P0455?
You can usually keep driving. But if there is a strong smell of fuel, switch off, keep any flame or cigarette away and call a mechanic: a fuel leak can catch fire.
Safety: never remove the radiator cap on a hot engine; boiling coolant can burn you. Keep your hands away from the fan and belts while the engine runs. If you smell fuel, switch off, keep any flame or cigarette away and call a mechanic.
When should you call a mechanic?
If the cap is fine and the code still comes back after a few days of driving, have a car mechanic (mistri) check it. They will test the hoses, purge valve and canister.