Solving P0446 on Your 2024 Lexus RX
A P0446 code on your 2024 Lexus RX signals an EVAP vent control circuit malfunction. The fifth-generation RX features the 2.4L turbocharged four-cylinder (RX 350), hybrid (RX 350h), or performance hybrid (RX 500h). Lexus uses a canister close valve (CCV) for EVAP vent control, built on Toyota's proven GA-K platform architecture.
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
- Hybrid/PHEV: EVAP monitors may run less frequently
Top Suspects
- Canister Close Valve (CCV) Defect (High Likelihood): Manufacturing variation in the CCV. Warranty-covered replacement.
- ECU Software Calibration (High Likelihood): New-platform EVAP monitoring update. Warranty-covered reflash.
- Purge VSV Issue (Medium Likelihood): Defective Vacuum Switching Valve affecting EVAP flow. Warranty-covered.
- CCV Wiring or Connector (Medium Likelihood): Factory assembly issue. Warranty-covered.
- Gas Cap Seal (Low Likelihood): Factory fit issue. Warranty-covered.
What to Do
Take your RX to a Lexus dealer. Under warranty, Techstream diagnostics and all EVAP repairs are free. Lexus dealers may offer complimentary loaner vehicles during service.
Full Warranty Coverage
Your 2024 RX 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 doesn't affect your RX's engine, transmission, AWD, safety systems, or any luxury features.