Powertrain
generic / SAE
P0455
Evaporative Emission System Leak Detected (Large Leak)
A large leak has been detected during the EVAP system pressure or vacuum test — large enough that the system cannot hold pressure for the diagnostic interval. Typically a missing fuel cap, disconnected hose, or split canister.
SystemPowertrain
Typegeneric / SAE
GroupP0
Range / number4 / 55
Possible causes
- Fuel cap missing or not seated high
- EVAP hose disconnected high
- Charcoal canister 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: 10–350 €
- Estimated time: 0.1–2.5 h
- Component: fuel filler cap
- Component: evap canister
- Component: evap hose
- MIL / check engine light
- emissions-relevant
- drive cycle required
Sources
References
sae:J2012