Solving P0446 on Your 2024 Ram 2500
A P0446 code on your 2024 Ram 2500 HD indicates an EVAP vent control circuit malfunction. The heavy-duty Ram offers the 6.4L HEMI V8 or 6.7L Cummins turbo diesel. Gas-powered models use Stellantis' ESIM for EVAP management.
Under full warranty, this is a dealer repair at no cost. The Ram HD platform is well-established with excellent dealer support.
Symptoms Present
- Check engine light on with P0446
- Fuel fill issues
- EVAP readiness monitor incomplete
- Possible companion codes
Likely Causes
- ESIM Module Defect (High Likelihood): Manufacturing variation in the ESIM. Warranty-covered.
- PCM Software Calibration (High Likelihood): HD EVAP monitoring updates. Warranty-covered.
- ESIM Connector or Wiring (Medium Likelihood): Factory assembly issue. Warranty-covered.
- EVAP Line Connection (Medium Likelihood): HD frame routing issue. Warranty-covered.
- Gas Cap Seal (Low Likelihood): Factory fit. Warranty-covered.
What to Do
Take your Ram 2500 to a dealer. Under warranty, wiTECH diagnostics and all repairs are free.
Full Warranty
Your 2024 Ram 2500 is covered by Ram's 3yr/36k basic, 5yr/60k powertrain, and federal emissions warranty (8yr/80k). All EVAP repairs are free.
Safe to Drive?
Yes. P0446 doesn't affect your 2500's engine, transmission, 4WD, towing, or payload capabilities.