P0456 on Your 2019 Grand Cherokee: The Investigation
Your 2019 Grand Cherokee (WK2—final generation of the classic platform) has triggered P0456—a very small EVAP leak. The 3.6L Pentastar V6, 5.7L HEMI, or 6.4L SRT uses a Stellantis EVAP system with NVLD. Basic warranty expired, but federal emissions (8yr/80k) covers through 2027.
Clues
- Check engine light on
- P0456 stored
- No performance symptoms
- Gas cap may show wear after 6+ years
Suspects
- Gas Cap Seal (High Likelihood): Six years of wear. $10–$15.
- NVLD Sensor (High Likelihood): Age-related failure—well-documented on WK2. Under emissions warranty or $130–$300.
- Purge Solenoid Valve (Medium Likelihood): Heat cycling. Under emissions warranty or $110–$260.
- EVAP Hose (Medium Likelihood): Rubber deterioration. $130–$270.
- Charcoal Canister (Low Likelihood): Fuel overfilling damage. $220–$420.
Diagnostic Steps
- Replace gas cap—$10–$15
- Clear code, drive 2–3 cycles
- Check federal emissions warranty—8yr/80k through 2027
- Dealer appointment—wiTech NVLD diagnostics
- Smoke test if out-of-pocket ($80–$150)
Costs
- Gas cap: $10–$15
- NVLD sensor: $130–$300 (may be emissions covered)
- Purge valve: $110–$260
- Federal emissions 8yr/80k through 2027
Can I Drive?
Yes. P0456 has zero impact on the engine, 4x4, Quadra-Drive, or towing.
Warranty
Basic 3yr/36k expired. Powertrain 5yr/60k expired. Federal emissions 8yr/80k covers EVAP through 2027. The WK2 is well-understood by Jeep dealers.