Cracking the P0446 Code on Your 2024 Jeep Grand Cherokee
A P0446 code on your 2024 Jeep Grand Cherokee reveals an EVAP vent control circuit malfunction. The fifth-generation Grand Cherokee (WL platform) — available with the 3.6L Pentastar V6, 5.7L HEMI V8, or 2.0L turbo 4xe PHEV — uses Stellantis' ESIM (Evaporative System Integrity Monitor) for vent control and leak detection. The PCM has detected a circuit fault in this integrated module.
Under full Jeep warranty, this is a zero-cost dealer fix. If your Grand Cherokee is a 4xe plug-in hybrid, mention this to the service advisor — EVAP monitors run differently on hybrid powertrains.
Symptoms Observed
- Check engine light on with P0446
- Fuel filling difficulty — nozzle clicks off early
- EVAP readiness monitor not completing
- May appear with P0440, P0455, or P0456
Most Likely Causes
- ESIM Unit Defect (High Likelihood): Manufacturing defect in the integrated ESIM module. Primary suspect on Stellantis vehicles. Warranty-covered.
- Factory Wiring or Connector Issue (High Likelihood): Assembly-line variations at the ESIM connector. Warranty-covered.
- PCM Software Calibration (Medium Likelihood): Updated EVAP monitoring software via wiTECH reflash. Free at the dealer.
- Purge Solenoid Issue (Medium Likelihood): A purge solenoid fault affecting ESIM circuit evaluation. Warranty-covered.
- Charcoal Canister Issue (Low Likelihood): Rare on a new vehicle. Warranty-covered.
What to Do
Visit a Jeep dealer. wiTECH diagnostics provide manufacturer-level ESIM testing and TSB access for the WL platform. Under full warranty, let the dealer handle it.
Warranty Coverage
Your 2024 Grand Cherokee is covered under Jeep's 3-year/36,000-mile basic warranty and 5-year/60,000-mile powertrain warranty. The federal emissions warranty adds 8 years/80,000 miles. Free repair.
Can I Drive With P0446?
Yes. P0446 doesn't affect your Grand Cherokee's engine, Quadra-Trac/Quadra-Drive AWD, air suspension, or any driving system. Full capability remains.