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P0455EVAP system leak detected (large leak)
P0455 means “EVAP system leak detected (large leak)”. It's a generic powertrain code (auxiliary emission controls), so it means the same on every make, including VW, Škoda, Audi, SEAT and Cupra.
- Not urgent
- SystemEmissions
- TypeGeneric (same on all makes)
- VCDS number16839
How urgent is it?
Usually not urgent; often emissions-related.
Which system and module
Scanline files it under Emissions. The first letter, P, means powertrain (engine, transmission, emissions).
Usually stored by the engine control unit (VCDS address 01, Engine).
What usually causes it
- Filler cap missing or loose
- disconnected hose
Typical causes are a starting point, not a diagnosis of your car.
Related codes
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