P0455 on Your 2024 Audi A6
A P0455 on your 2024 A6 (C8) means a large EVAP leak. Whether you have the 2.0L or 3.0L TFSI, your vehicle is fully under Audi warranty. Gas cap first.
Symptoms
- Check engine light with P0455
- Possible fuel smell
- Gas cap not clicking
- EVAP monitor incomplete
Top Causes
- Gas Cap Seal (Very High Likelihood): Loose or factory defect. Warranty-covered.
- N80 Purge Valve (Medium Likelihood): VAG solenoid. Warranty-covered.
- Leak Detection Pump (Medium Likelihood): VAG LDP. Warranty-covered.
- EVAP Canister (Low Likelihood): Factory issue. Warranty-covered.
- Software Calibration (Low Likelihood): ECU update. Warranty-covered.
What to Do
Tighten the gas cap and drive 2–3 days. If P0455 persists, your Audi dealer will diagnose and repair free using ODIS.
Warranty
Your 2024 A6 is covered by Audi's 4-year/50,000-mile warranty through 2028. Federal emissions (8yr/80k) extends through 2032.
Safe to Drive?
Yes. P0455 doesn't affect TFSI power, quattro, or any features.