Cracking the P0446 Code on Your 2023 Hyundai Palisade
A P0446 code on your 2023 Hyundai Palisade signals an electrical malfunction in the EVAP vent control circuit. The refreshed Palisade (LX2 platform, updated for 2023) with its 3.8L Lambda II V6 uses a Canister Close Valve (CCV) for EVAP vent control. The PCM has detected that this valve's circuit isn't operating as designed.
The 2023 Palisade brought exterior and interior refreshes to Hyundai's flagship SUV, including updated lighting and new tech features. The EVAP system fundamentals remain consistent with the proven LX2 platform. With full warranty coverage, this is a worry-free situation.
Symptoms on the Scene
- Check engine light on with P0446
- Possible fuel pump difficulty — nozzle clicks off early
- EVAP readiness monitor incomplete
- May appear alongside P0441 or P0455
Likely Causes
- Canister Close Valve (CCV) Failure (High Likelihood): The CCV solenoid is the most common P0446 trigger on Hyundai vehicles. Even on the refreshed Palisade, this component can fail electrically. Warranty-covered.
- CCV Connector or Wiring Defect (High Likelihood): A factory connector issue or wiring routing problem at the CCV is a strong suspect on a relatively new vehicle. No-cost warranty repair.
- PCM Software Calibration (Medium Likelihood): The refreshed 2023 model may benefit from updated PCM software to optimize EVAP monitoring. Free dealer reflash.
- Fuel Tank Pressure Sensor (FTPS) Fault (Medium Likelihood): An FTPS providing incorrect data can affect vent circuit diagnostics. Warranty-covered.
- Ground Circuit Issue (Low Likelihood): A poor ground affecting the CCV circuit can create intermittent codes. Warranty-covered.
What to Do
Head to a Hyundai dealer. Their GDS diagnostic system provides full bidirectional testing of the CCV, FTPS monitoring, and access to any TSBs for the refreshed Palisade. With full warranty coverage, the dealer visit is the clear choice.
Warranty Coverage
Your 2023 Palisade is well within Hyundai's 5-year/60,000-mile basic warranty and the 10-year/100,000-mile powertrain warranty. The federal emissions warranty adds 8 years/80,000 miles of EVAP protection. This repair costs you nothing.
Can I Drive With P0446?
Yes. P0446 is an emissions-only code. Your Palisade's 291-hp V6, 8-speed transmission, HTRAC AWD, and all premium features work normally. No safety or performance concerns.