Solving P0446 on Your 2024 Lexus ES
A P0446 code on your 2024 Lexus ES signals an EVAP vent control circuit malfunction. The ES continues on Toyota's GA-K platform with the 2.5L four-cylinder (ES 250/350) or hybrid (ES 300h). Lexus uses a canister close valve (CCV) for vent control, a proven Toyota-engineered design.
Under full warranty, this is a no-cost dealer repair with Lexus' premium service experience.
Symptoms Present
- Check engine light with P0446
- Fuel fill difficulty
- EVAP readiness monitor incomplete
Top Suspects
- Canister Close Valve (CCV) Defect (High Likelihood): Manufacturing variation in the CCV. Warranty-covered.
- ECU Software Calibration (High Likelihood): EVAP monitoring calibration update. Warranty-covered reflash.
- Purge VSV Issue (Medium Likelihood): Defective Vacuum Switching Valve. Warranty-covered.
- CCV Wiring or Connector (Medium Likelihood): Factory assembly issue. Warranty-covered.
- Gas Cap Seal (Low Likelihood): Factory fit. Warranty-covered.
What to Do
Take your ES to a Lexus dealer. Under warranty, Techstream diagnostics and all EVAP repairs are free.
Full Warranty Coverage
Your 2024 ES is covered by Lexus' 4-year/50,000-mile basic and 6-year/70,000-mile powertrain warranty. All EVAP repairs are free.
Safe to Drive?
Yes. P0446 has no effect on your ES's engine, hybrid system, transmission, or luxury amenities.