P0455 on Your 2024 Audi A4 — The Final A4
A P0455 on your 2024 A4 means a large EVAP leak. As the last year of the A4 nameplate (transitioning to A5 for 2025), your 2.0L TFSI is fully under 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 purge 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 free using ODIS.
Warranty
Your 2024 A4 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 turbo, quattro, or any features.