Investigating P0456 on Your 2021 Cherokee
Your 2021 Cherokee (KL) has triggered P0456—a very small EVAP leak. The 2.4L Tigershark or 3.2L Pentastar V6 uses a Stellantis EVAP system with NVLD. Basic warranty (3yr/36k) expired in 2024. Federal emissions (8yr/80k) covers EVAP through 2029.
Evidence
- Check engine light on
- P0456 stored
- No performance issues
- Gas cap may show wear
Suspects
- Gas Cap Seal (High Likelihood): Four years of wear. $10–$15.
- NVLD Sensor (High Likelihood): Age-related failure. Under emissions warranty or $120–$280.
- Purge Solenoid Valve (Medium Likelihood): Heat cycling on the 2.4L. Under emissions warranty or $100–$240.
- EVAP Hose (Medium Likelihood): Rubber aging. $120–$250.
- Charcoal Canister (Low Likelihood): Fuel overfilling. $200–$380.
Diagnostic Steps
- Replace gas cap—$10–$15
- Clear code, drive 2–3 cycles
- Check federal emissions warranty—8yr/80k through 2029
- Dealer appointment for wiTech NVLD diagnostics
- Smoke test if needed ($80–$150)
Costs
- Gas cap: $10–$15
- NVLD sensor: $120–$280 (may be emissions covered)
- Purge valve: $100–$240
- Federal emissions 8yr/80k through 2029
Can I Drive?
Yes. P0456 has zero impact on the engine, 4x4, or safety.
Warranty
Basic 3yr/36k expired. Powertrain 5yr/60k through 2026. Federal emissions 8yr/80k covers EVAP through 2029.