Pursuing P0455 on Your 2022 Audi A6
A P0455 on your 2022 A6 (C8 generation) indicates a large EVAP leak. Whether you have the 2.0L TFSI or 3.0L TFSI V6, the VAG EVAP system uses N80 purge valve and leak detection pump technology. Your warranty runs through 2026.
Clues
- Check engine light on
- P0455 stored in ECU
- Possible fuel smell
- Gas cap worn
Suspects by Likelihood
- Gas Cap Seal (Very High Likelihood): Loose or worn. $0–$30.
- N80 Purge Valve (Medium Likelihood): VAG solenoid valve. $150–$320 installed.
- Leak Detection Pump (Medium Likelihood): VAG LDP module. $200–$400 installed.
- EVAP Canister (Low-Medium Likelihood): Charcoal saturation. $280–$500 installed.
- Fuel Tank Breather Valve (Low Likelihood): Seal issue. $140–$300 installed.
Diagnosis
Replace the gas cap first. If P0455 persists, VCDS or dealer ODIS diagnostics will pinpoint the leak. Independent Audi specialists with VCDS are cost-effective.
Warranty
Audi's 4yr/50k warranty runs through 2026. Federal emissions (8yr/80k) covers EVAP through 2030.
Safe to Drive?
Yes. P0455 doesn't affect TFSI performance, quattro, or any A6 features.