2022 Volkswagen Passat P0456: Very Small EVAP Leak Guide

P0456 on Your 2022 Passat: The Final Year

Your 2022 Passat (NMS—final production year in the US) has triggered P0456—a very small EVAP leak. The 2.0L EA888 TSI turbo uses VW's LDP. VW 4yr/50k warranty runs through 2026.

Evidence

• Check engine light on
• P0456 stored
• No performance issues
• Gas cap may need reseating

Suspects

1. Gas Cap Seal (High Likelihood): Loose or worn. $0 warranty or $10–$20.
2. Leak Detection Pump (High Likelihood): VW LDP. $0 warranty or $210–$400.
3. N80 Purge Valve (Medium Likelihood): Common VW failure. $0 warranty or $140–$290.
4. EVAP Hose (Medium Likelihood): Connection. $120–$250.
5. Activated Carbon Canister (Low Likelihood): Fuel overfilling. $260–$440.

Diagnostic Steps

1. Reseat gas cap
2. Check warranty—VW 4yr/50k through 2026
3. VW dealer—ODIS diagnostics

Costs

• Under warranty: $0
• Gas cap: $10–$20
• LDP: $210–$400
• N80 valve: $140–$290

Can I Drive?

Yes. P0456 has zero impact on the TSI turbo or performance.

Warranty

VW 4yr/50k through 2026. Federal emissions 8yr/80k through 2030. Final year—parts remain available through VW dealers.

Frequently Asked Questions