Tracking the P0446 Code on Your 2022 Chevrolet Traverse
The P0446 code on your 2022 Traverse indicates the PCM found a circuit malfunction in the EVAP vent control system. The vent valve solenoid isn't electrically responding as expected—this is a circuit fault, not a vapor leak. For a three-year-old crossover, this typically points to a component defect or connector issue.
Your 2022 Traverse runs on GM's C1XX platform with the 3.6L V6, offering spacious three-row family transport. The EVAP system follows GM's standard design with the vent valve solenoid near the charcoal canister at the rear of the vehicle.
What You've Observed
- Check engine light with P0446 stored or pending
- P0449 may accompany P0446
- Fuel filling difficulty—nozzle clicks off repeatedly
- EVAP readiness monitor may not complete
- No performance or drivability concerns
Ranked Suspects
For the 2022 Traverse, the evidence points to:
- Vent Valve Solenoid Failure (High Likelihood): The leading P0446 cause. A coil failure or stuck valve in the vent valve solenoid is the most frequent finding, even on relatively new vehicles. Parts: $35–$70, labor: $80–$150.
- Connector Corrosion or Loose Fit (High Likelihood): Moisture intrusion at the vent valve solenoid connector causes intermittent circuit faults. This can develop within a few years of road exposure. Repair: $50–$150.
- Wiring Harness Damage (Medium Likelihood): Road debris can damage the wiring between the PCM and rear-mounted vent solenoid. Inspection and repair: $100–$250.
- Charcoal Canister Issue (Medium Likelihood): A contaminated canister from fuel overfilling can affect vent circuit function. Replacement: $140–$300.
- PCM Calibration (Low Likelihood): GM may have updated EVAP monitoring calibrations for the C1XX platform. A dealer reflash: $100–$180.
Diagnostic Approach
Start with an OBD-II scan for P0446 and P0449. Inspect the vent valve solenoid connector at the rear of the vehicle. Test solenoid resistance and operation. A quality scan tool with GM enhanced mode allows bidirectional testing of the vent valve solenoid. Check GM's TSB database for any bulletins affecting the 2022 C1XX EVAP system.
Warranty Check
Your 2022 Traverse may still be within GM's 3-year/36,000-mile bumper-to-bumper warranty depending on purchase date and mileage. The federal emissions warranty covers EVAP components for 8 years/80,000 miles through 2030. Verify your specific coverage before paying for repairs.
Resolution
The P0446 on your 2022 Traverse is a common, well-understood code. Your family crossover's three-row comfort, V6 performance, and daily usability aren't affected. With warranty coverage likely still available, checking with your Chevrolet dealer first is the smart financial move. The vent valve solenoid replacement is the most common fix.