Solving P0446 on Your 2024 Ram 1500
A P0446 code on your 2024 Ram 1500 indicates an EVAP vent control circuit malfunction. The Ram 1500 offers the 5.7L HEMI V8 (with available eTorque mild hybrid), 3.6L Pentastar V6, or 3.0L Hurricane twin-turbo I6. All use Stellantis' ESIM (Evaporative System Integrity Monitor) for EVAP management.
Under full warranty, this is a dealer repair at no cost. The Ram 1500's large fuel tank (26-33 gallons depending on configuration) means extensive EVAP plumbing, but the diagnosis centers on the ESIM module.
Symptoms Present
- Check engine light on with P0446
- Fuel fill issues at the pump
- EVAP readiness monitor incomplete
- Possible companion EVAP codes
Top Suspects
- ESIM Module Defect (High Likelihood): The integrated ESIM unit handles both vent control and leak detection. Manufacturing defects occur even on new trucks. Warranty-covered.
- PCM Software Calibration (High Likelihood): EVAP monitoring calibration updates for the latest Ram 1500. Dealer reflash. Warranty-covered.
- ESIM Connector or Wiring (Medium Likelihood): Factory assembly issue in the ESIM circuit. Warranty-covered.
- EVAP Line Connection (Medium Likelihood): The Ram's large body-on-frame platform has extensive EVAP routing along the frame rails. Factory connection issue. Warranty-covered.
- Gas Cap Seal (Low Likelihood): Factory cap fit. Warranty-covered.
What to Do
Schedule a Ram dealer appointment. Under warranty, wiTECH diagnostics, software updates, and component replacements are free.
Full Warranty
Your 2024 Ram 1500 is covered by Ram's 3-year/36,000-mile basic warranty, 5-year/60,000-mile powertrain warranty, and federal emissions warranty (8yr/80k). All EVAP repairs are free.
Safe to Drive?
Yes. P0446 doesn't affect your Ram's engine, transmission, 4WD, towing capacity, or any truck functionality.