Solving P0446 on Your 2024 Jeep Grand Wagoneer
A P0446 code on your 2024 Jeep Grand Wagoneer reveals an EVAP vent control circuit malfunction. The current Grand Wagoneer offers both the 6.4L HEMI V8 (471 hp) and the new 3.0L Hurricane twin-turbo inline-six (510 hp). Both powertrains use Stellantis' ESIM (Evaporative System Integrity Monitor) for EVAP management.
Under full factory warranty, this is entirely a dealer repair at no cost. The Grand Wagoneer's premium status means dealer service departments are well-equipped for this diagnosis.
Symptoms Present
- Check engine light on with P0446
- Fuel fill issues at the pump
- EVAP monitor incomplete
- Possible companion EVAP codes
Possible Causes
- ESIM Module Defect (High Likelihood): Manufacturing defect in the integrated ESIM unit. Most common P0446 cause on all Stellantis vehicles. Warranty-covered.
- PCM/ECM Software Calibration (High Likelihood): Both the HEMI V8 and Hurricane I6 may have EVAP calibration updates available. Software refinements are common on current-production vehicles. Warranty-covered.
- Factory Wiring or Connector Issue (Medium Likelihood): Assembly-line variation in the ESIM circuit wiring or connector seating. Warranty-covered.
- EVAP System Plumbing Issue (Medium Likelihood): Loose connections or improperly routed lines along the full-size frame. Warranty-covered.
- Gas Cap Seal Issue (Low Likelihood): Factory cap may not seal correctly. Quick replacement. Warranty-covered.
Recommended Action
Schedule a service appointment at your Jeep dealer. Under full warranty, wiTECH diagnostics, TSB review, software updates, and any component replacement are covered at no cost.
Full Warranty Protection
Your 2024 Grand Wagoneer is covered by Jeep's 3-year/36,000-mile basic warranty, 5-year/60,000-mile powertrain warranty, and the federal emissions warranty (8 years/80,000 miles). All EVAP repairs are free.
Safe to Drive?
Absolutely. P0446 doesn't affect your Grand Wagoneer's HEMI V8 or Hurricane I6, 8-speed automatic, Quadra-Trac II 4WD, air suspension, towing capacity, or luxury features. Drive normally to the dealer.