Investigating P0446 on Your Jeep Cherokee
A P0446 code on your Jeep Cherokee points to an EVAP vent control circuit malfunction. The Cherokee (KL platform) — available with the 2.4L Tigershark four-cylinder or 3.2L Pentastar V6 — uses Stellantis' NVLD (Natural Vacuum Leak Detection) system for EVAP vent control and monitoring. The PCM has detected an electrical fault in this circuit.
The Cherokee's compact SUV design positions EVAP components in a reasonably protected package, but years of road exposure can still affect electrical connections. As one of the final Cherokee model years, the platform is well-understood.
Symptoms You May See
- Check engine light on with P0446
- Fuel nozzle clicking off during fill-ups
- EVAP readiness monitor not completing
- May appear with P0440 or P0455
Ranked Suspects
- NVLD Unit Failure (High Likelihood): The NVLD module near the fuel tank is the primary P0446 suspect on Stellantis vehicles. Electrical failure or stuck internal components. Parts $70–$160, labor $100–$230.
- NVLD Connector or Wiring Issue (High Likelihood): Road exposure corrodes the NVLD electrical connections over time. Repair costs $80–$270.
- Purge Solenoid Issue (Medium Likelihood): A failing purge solenoid creates system pressure imbalances that affect NVLD circuit evaluation. Replacement costs $75–$195.
- Charcoal Canister Degradation (Medium Likelihood): Age and fuel overfilling degrade the canister. Replacement costs $160–$350.
- PCM Software Calibration (Low Likelihood): Updated software may refine EVAP monitoring. Dealer reflash $100–$200.
Diagnostic Steps
- Scan for all codes and freeze frame data
- Locate the NVLD near the fuel tank
- Inspect the NVLD connector for corrosion
- Test the NVLD circuit electrically
- Use wiTECH for bidirectional testing if available
- Check wiring from the NVLD to the PCM
Cost Breakdown
- NVLD replacement: $170–$390
- Wiring/connector repair: $80–$270
- Purge solenoid: $75–$195
- Charcoal canister: $160–$350
- Diagnostic fee: $90–$150
Can I Drive With P0446?
Yes. P0446 is an emissions circuit code. Your Cherokee's engine, 9-speed automatic, and Active Drive AWD system are unaffected.
Warranty and DIY
Check your warranty status — coverage depends on your model year and mileage. The federal emissions warranty covers EVAP for 8 years/80,000 miles. For DIY, the NVLD is accessible but uses Stellantis' unique system rather than a standard vent solenoid.