Powertrain
generic / SAE
P04EA
EVAP System Small Leak Detected Fuel Tank Side
The EVAP leak diagnostic has detected a small leak on the fuel tank side of the system - typically a hose, gasket, fuel cap, or fuel sender flange that does not seal completely. Vapor escapes during pressure or vacuum tests.
SystemPowertrain
Typegeneric / SAE
GroupP0
Range / number4 / EA
Possible causes
- Fuel cap not sealing properly high
- Vapor hose porous or cracked medium
Symptoms
- Check engine light on
- Possible smell of fuel near tank or engine bay
- Failed emissions inspection
- Loose-cap warning may appear
Inspection / repair
- Difficulty: easy
- DIY: possible
- Estimated cost: 25–350 €
- Estimated time: 0.3–2 h
- Component: fuel tank
- Component: fuel cap
- Component: fuel sender seal
- Component: evap hose tank side
- MIL / check engine light
- emissions-relevant
Sources
References
sae:J2012