Solving the P0446 on Your 2022 Jeep Grand Cherokee
A P0446 code on your 2022 Jeep Grand Cherokee points to an EVAP vent control circuit malfunction. As the first year of the fifth-generation Grand Cherokee (WL platform), your SUV uses Stellantis' ESIM (Evaporative System Integrity Monitor) — an integrated module handling both vent control and leak detection. Whether you have the 3.6L V6, 5.7L HEMI V8, or 2.0L 4xe PHEV, the PCM has found a circuit fault.
First-year production vehicles on a new platform sometimes have early-production electrical concerns. At three to four years old, warranty coverage is likely still active.
Symptoms at the Scene
- Check engine light on with P0446
- Fuel filling difficulty
- EVAP monitor not completing
- May appear with P0440 or P0455
Ranked Suspects
- ESIM Unit Failure (High Likelihood): The integrated ESIM module is the primary P0446 cause on Stellantis vehicles. As a first-year WL, early production units may be more susceptible. Parts $85–$185, labor $120–$260.
- ESIM Connector Corrosion (High Likelihood): Road moisture and salt corrode the ESIM connector. The Grand Cherokee's off-road capability may expose it to additional elements. Repair costs $80–$250.
- Purge Solenoid Issue (Medium Likelihood): A failing purge solenoid affects ESIM circuit evaluation. Replacement costs $85–$210.
- Wiring Harness Damage (Medium Likelihood): The large SUV's extended wiring runs create more potential for road damage. Repair costs $100–$300.
- PCM Software Calibration (Low Likelihood): First-year WL models may need updated EVAP software. Dealer reflash $100–$200.
Diagnostic Approach
- Scan for codes and companions
- Inspect the ESIM connector for corrosion and damage
- Test the ESIM circuit electrically
- Use wiTECH for bidirectional testing
- Check wiring from the ESIM to the PCM
- Inspect the charcoal canister
Cost Breakdown
- ESIM replacement: $205–$445
- Connector/wiring repair: $80–$300
- Purge solenoid: $85–$210
- Diagnostic fee: $100–$160
Can I Drive With P0446?
Yes. P0446 is emissions-only. Your Grand Cherokee's engine, Quadra-Trac AWD, air suspension, and all driving features remain fully operational.
Warranty Status
Your 2022 Grand Cherokee should be within Jeep's 3-year/36,000-mile basic warranty. The federal emissions warranty covers EVAP for 8 years/80,000 miles. Dealer visit recommended.