P0456 on Your 2022 Maxima: A Minor Case
Your 2022 Maxima (8th generation) has flagged P0456—a very small EVAP leak. The 3.5L VQ35DE V6 with CVT uses Nissan's EVAP system with leak detection pump. At 3–4 years old, check warranty before any spending.
Symptoms
- Check engine light on
- P0456 stored
- No performance changes
- All 300 hp available
Causes
- Gas Cap Seal (High Likelihood): Loose or worn. $0–$15 (warranty may cover).
- EVAP Leak Detection Pump (High Likelihood): Nissan-specific. $0–$320 (warranty may cover).
- Purge Volume Control Valve (Medium Likelihood): VQ35 heat. $0–$240 (warranty may cover).
- Canister Close Valve (Medium Likelihood): Nissan vent valve. $0–$250 (warranty may cover).
- EVAP Hose (Low Likelihood): Connection. $100–$220.
Next Steps
- Reseat gas cap
- Check warranty—Nissan 3yr/36k runs through 2025
- Dealer appointment if covered
- If not, replace cap, clear code, monitor
Costs
- Under warranty: $0
- Gas cap: $10–$15
- Leak detection pump: $180–$320
Can I Drive?
Yes. P0456 has zero impact on the Maxima's performance, V6, or CVT.
Warranty
Nissan's 3yr/36k runs through 2025. Federal emissions (8yr/80k) covers EVAP through 2030. Note: Maxima was discontinued after 2023, but warranty and parts continue.