Investigating P0446 on Your 2022 Lexus ES
A P0446 code on your 2022 Lexus ES indicates an EVAP vent control circuit malfunction. The seventh-generation ES uses a 2.5L four-cylinder (ES 250/350) or 2.5L hybrid (ES 300h), both built on Toyota's GA-K platform. Lexus uses a canister close valve (CCV) for EVAP vent control, shared with Toyota's reliable architecture.
Check your warranty—the Lexus basic warranty (4yr/50k) may still be active. The powertrain warranty (6yr/70k) extends through 2028.
Clues and Symptoms
- Check engine light with P0446
- Fuel fill difficulty
- EVAP readiness monitor incomplete
- ES 300h hybrid: monitors may run less frequently
Top Suspects
- Canister Close Valve (CCV) Failure (High Likelihood): The CCV controls vent airflow and can fail electrically or mechanically. Replacement costs $140–$250 if not warranty-covered.
- Purge VSV Malfunction (High Likelihood): The Vacuum Switching Valve sticks, disrupting EVAP flow. Replacement runs $120–$220.
- CCV Wiring or Connector (Medium Likelihood): Corrosion or damage at the valve connector. Repair costs $80–$170.
- Charcoal Canister (Medium Likelihood): Canister degradation or saturation. Replacement runs $200–$370.
- Gas Cap Seal (Low Likelihood): Worn seal. Replacement is $15–$30.
How to Investigate
Scan for all codes. A Techstream scan at a Lexus dealer provides CCV and purge VSV commanded testing. For DIY, check the gas cap seal first. Lexus EVAP systems are Toyota-engineered and highly reliable—a P0446 typically indicates a definitive component failure.
Warranty and Cost
The Lexus basic warranty (4yr/50k) may still apply. The powertrain warranty (6yr/70k) covers through 2028, and the federal emissions warranty (8yr/80k) through 2030. Under warranty, all repairs are free. Out of pocket: $120–$370.
Safe to Drive?
Yes. P0446 has no effect on your ES's engine, transmission, ride quality, or any luxury features.