Investigating P0446 on Your 2022 Infiniti QX80
A P0446 code on your 2022 Infiniti QX80 indicates an EVAP vent control circuit malfunction. The Y62-generation QX80 uses the 5.6L V8 (VK56VD) on a body-on-frame platform. Infiniti's EVAP system features a canister vent control valve and PVCV (Purge Volume Control Valve) with Nissan's leak detection pump monitoring.
Infiniti's basic warranty (4yr/60k) should still be active. The powertrain warranty (6yr/70k) extends through 2028.
Clues and Symptoms
- Check engine light with P0446
- Fuel fill difficulty at the pump
- EVAP readiness monitor incomplete
- Possible fuel odor
Top Suspects
- Canister Vent Control Valve Failure (High Likelihood): The vent valve on the body-on-frame QX80 is exposed to road conditions. Replacement costs $140–$270.
- PVCV Malfunction (High Likelihood): The V8 generates significant fuel vapors that stress the purge valve. Replacement runs $130–$250.
- Leak Detection Pump (Medium Likelihood): Nissan's dedicated EVAP monitoring pump can fail. Replacement costs $160–$310.
- Vent Valve Wiring or Connector (Medium Likelihood): Body-on-frame underbody exposure. Repair costs $90–$200.
- Gas Cap Seal (Low Likelihood): Worn seal. Replacement is $15–$35.
How to Investigate
Under warranty, go to an Infiniti dealer for CONSULT diagnostics. The QX80's body-on-frame layout makes underbody EVAP components accessible. Check the gas cap first, then the vent valve connector.
Warranty and Cost
Infiniti's basic warranty (4yr/60k) should be active. The powertrain warranty (6yr/70k) covers through 2028. Under warranty, all repairs are free. Out of pocket: $130–$310.
Safe to Drive?
Yes. P0446 doesn't affect your QX80's V8 power, 4WD, towing capacity, or any luxury features.