P0455: EVAP System Large Leak Detected
Severity: Low
What it means
The fuel vapor system has a large leak.
Common symptoms
- Check engine light
- Fuel smell
Common causes
- Missing or loose gas cap
- Disconnected EVAP hose
- Stuck-open vent valve
What to check first
- Check the gas cap is present and clicks tight
- Look for disconnected hoses
Causes vary by vehicle. Confirm with testing before replacing parts.
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