P0442 on Your 2024 Audi A6
A P0442 code on your 2024 Audi A6 indicates a small evaporative emission system leak. On a brand-new luxury sedan, this is typically minor — your Audi warranty covers the repair.
EVAP System
The 2024 A6 uses the VAG EVAP system with an N80 purge regulator valve, charcoal canister shut-off valve, and charcoal canister. The ECM monitors pressure decay to detect leaks.
Likely Causes
- Gas cap not fully seated (35%) — The most common trigger.
- N80 purge valve defect (25%) — VAG's known weak point.
- EVAP connection issue (20%) — A factory fitting that loosened.
- Shut-off valve defect (10%) — A factory imperfection.
- Software calibration (10%) — Parameters may need updating.
What to Do
Reseat your gas cap. If persistent, visit your Audi dealer. ODIS provides comprehensive testing. All repairs are warranty-covered.
Costs ($0 Under Warranty)
- Gas cap: $30–$60
- N80 purge valve: $160–$370
- EVAP hose repair: $100–$280
- Shut-off valve: $170–$390
Warranty
Your 2024 A6 is covered under Audi's 4-year/50,000-mile basic warranty and federal 8-year/80,000-mile emissions warranty. All P0442 repairs are free.