Tracking P0456 on Your 2022 Grand Cherokee
Your 2022 Grand Cherokee (WL—first year of the new generation) has triggered P0456—a very small EVAP leak. The 3.6L Pentastar V6 or 5.7L HEMI uses a Stellantis EVAP system with NVLD. Stellantis 3yr/36k warranty runs through 2025—check mileage.
Evidence
- Check engine light on
- P0456 stored
- No performance issues
- Gas cap may need reseating
Suspects
- Gas Cap Seal (High Likelihood): Loose or worn. $0 warranty or $10–$15.
- NVLD Sensor (High Likelihood): First-year platform component. $0 warranty or $130–$300.
- Purge Solenoid Valve (Medium Likelihood): Standard failure. $0 warranty or $110–$260.
- EVAP Hose (Medium Likelihood): Connection point. $130–$270.
- Charcoal Canister (Low Likelihood): Fuel overfilling. $220–$420.
Diagnostic Steps
- Reseat gas cap
- Check warranty—3yr/36k through 2025
- Dealer appointment—wiTech for NVLD diagnostics
- Ask about first-year WL platform TSBs
- Smoke test if out of warranty ($80–$150)
Costs
- Under warranty: $0
- Gas cap: $10–$15
- NVLD sensor: $130–$300
- Purge valve: $110–$260
Can I Drive?
Yes. P0456 has zero impact on the engine, 4x4, or towing.
Warranty
Stellantis 3yr/36k through 2025—check mileage. Federal emissions 8yr/80k through 2030. First-year WL—ask about TSBs.