P0455Severity: Low
P0455 – EVAP System Large Leak
A large leak was detected in the EVAP system.
What it means
There is a large leak in the fuel-vapor system. The most common cause is an open/faulty fuel cap; then hoses and valves are checked.
Symptoms
- Check-engine light
- Fuel smell
- No noticeable driving effect
Common causes
- Open/faulty fuel cap
- Disconnected/cracked EVAP hose
- Faulty purge/vent valve
- Canister damage
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Frequently asked questions
What does trouble code P0455 mean?
P0455 – EVAP System Large Leak. There is a large leak in the fuel-vapor system. The most common cause is an open/faulty fuel cap; then hoses and valves are checked.
Can I drive with a P0455 code?
It's usually not urgent, but finding and fixing the cause matters for emissions and fuel economy.