Solving P0446 on Your 2024 Acura RDX
A P0446 code on your 2024 Acura RDX signals an EVAP vent control circuit malfunction. The RDX uses a 2.0L turbocharged engine with Acura's SH-AWD system. The EVAP system features a canister vent shut valve and bypass solenoid valve, built on Honda's reliable architecture.
Under full warranty, this is a no-cost dealer repair.
Symptoms Present
- Check engine light with P0446
- Fuel fill difficulty
- EVAP readiness monitor incomplete
Top Suspects
- Canister Vent Shut Valve Defect (High Likelihood): Manufacturing variation. Warranty-covered.
- ECU Software Calibration (High Likelihood): EVAP monitoring update. Warranty-covered reflash.
- Bypass Solenoid Valve Issue (Medium Likelihood): Defective purge valve. Warranty-covered.
- Vent Valve Wiring or Connector (Medium Likelihood): Factory assembly issue. Warranty-covered.
- Gas Cap Seal (Low Likelihood): Factory fit. Warranty-covered.
What to Do
Take your RDX to an Acura dealer. HDS diagnostics and all EVAP repairs are free under warranty.
Full Warranty Coverage
Your 2024 RDX is covered by Acura's 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 RDX's turbo engine, SH-AWD, transmission, or any features.