Powertrain
generic / SAE
P0442
Evaporative Emission System Leak Detected (Small Leak)
A small leak (typically equivalent to a 0.040 inch / 1.0 mm orifice) has been detected in the EVAP system. By far the most common cause is a fuel cap that is loose, missing, or has a worn seal.
SystemPowertrain
Typegeneric / SAE
GroupP0
Range / number4 / 42
Possible causes
- Fuel cap loose, missing, or worn seal high
- Small crack in EVAP hose medium
- Purge valve leaking low
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: 10–250 €
- Estimated time: 0.1–2 h
- Component: fuel filler cap
- Component: evap canister
- Component: evap purge valve
- MIL / check engine light
- emissions-relevant
- drive cycle required
Sources
References
sae:J2012