EVAP System Small Leak Detected Fresh Air Side
Same as P04EA but on the fresh-air side - the path between vent valve and atmosphere is not sealing completely during the active test phase.
Affected components
- Evap vent valve
- Evap canister
- Evap hose fresh air side
Common causes
- High likelihood: Vent valve does not seal in test mode
- Medium likelihood: Hose porous or cracked
Possible symptoms
- Check engine light on
- Possible smell of fuel near tank or engine bay
- Failed emissions inspection
- Loose-cap warning may appear
Diagnostic notes
- The malfunction indicator lamp may illuminate
- This code can affect emissions
Sources
Diagnostic information is provided for reference only. Confirm the code with a compatible scan tool and follow the vehicle manufacturer's service procedures before replacing components.