Solving P0446 on Your 2024 Jeep Gladiator
A P0446 code on your 2024 Jeep Gladiator indicates an EVAP vent control circuit malfunction. The current JT Gladiator powered by the 3.6L Pentastar V6 uses Stellantis' ESIM (Evaporative System Integrity Monitor) module for EVAP system management.
On a brand-new truck under full factory warranty, this is a dealer repair at no cost. Do not attempt DIY diagnosis — let the dealership handle it with their wiTECH diagnostic system.
What You're Seeing
- Check engine light on with P0446
- Fuel fill issues — nozzle shutting off
- EVAP readiness monitor incomplete
- May store companion EVAP codes
Possible Causes
- ESIM Module Manufacturing Defect (High Likelihood): On a new vehicle, factory defects are the top suspect. The integrated ESIM unit may have an internal fault. Warranty-covered.
- Factory Wiring or Connector Fault (High Likelihood): Assembly-line issues with the ESIM wiring or connector. Warranty-covered.
- PCM Software Calibration Needed (Medium Likelihood): First-year calibration updates are common. A PCM reflash may resolve the EVAP monitoring sensitivity. Warranty-covered.
- EVAP System Assembly Issue (Medium Likelihood): Loose hose connections or improperly routed lines from the factory. Warranty-covered.
- Gas Cap Fit (Low Likelihood): Factory gas cap may not seal properly. Simple warranty replacement. Warranty-covered.
What to Do
Schedule a service appointment at your Jeep dealer. Under full warranty, the dealer will diagnose using wiTECH, check for TSBs, apply any software updates, and replace faulty components — all free of charge.
Full Warranty Protection
Your 2024 Gladiator 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). Zero out-of-pocket cost for EVAP repairs.
Safe to Drive?
Absolutely. P0446 doesn't affect your Gladiator's 285-hp 3.6L V6, manual or automatic transmission, 4WD, towing capability, or off-road systems. Full truck capability is maintained.