Decoding the P0440 on Your 2024 Audi A6
A P0440 code on your 2024 Audi A6 signals an EVAP system malfunction. Your executive sedan is fully covered under Audi's factory warranty for a no-cost repair.
The 2024 A6 EVAP System
The A6 uses VW Group's proven EVAP design with the N80 purge valve, leak detection pump, charcoal canister, fuel tank pressure sensor, and vent valve.
Most Likely Causes
- Gas Cap Issue (33%) — Not fully seated. Cost: $0.
- N80 Purge Valve (22%) — VAG's common failure. Cost: $0 under warranty.
- Factory Issue (18%) — Assembly connection. Cost: $0 under warranty.
- LDP Issue (12%) — Leak detection pump. Cost: $0 under warranty.
- Software (10%) — ECM update. Cost: $0 under warranty.
- Vent Valve (5%) — Sealing. Cost: $0 under warranty.
Audi Warranty
- New Vehicle Limited Warranty: 4 years/50,000 miles
Check the gas cap first. Dealer handles the rest via ODIS at no cost.
The Verdict
The P0440 on your 2024 A6 is a warranty repair. The C8 platform's EVAP system is mature and proven — this is a minor, one-time fix.