Investigating P0442 on Your 2023 Hyundai Palisade
A P0442 code on your 2023 Hyundai Palisade means the engine control module has found a small leak in the evaporative emission control system. This system captures fuel vapors and recycles them through the engine. P0442 flags a leak roughly 0.020 inches in diameter.
The 2023 Palisade is Hyundai's flagship three-row SUV with the 3.8L V6 and 8-speed automatic. Hyundai's EVAP system uses the PCSV, CCV, and FTPS. As a relatively new vehicle under full warranty, dealer service is the smart approach.
Probable Causes
- Gas Cap Not Properly Sealed — A loose or cross-threaded cap is the most common trigger. Check this first.
- PCSV Issue — The 3.8L V6's underhood heat can begin to stress the Purge Control Solenoid Valve even after a couple years.
- CCV Concern — Moisture or debris can affect the Canister Close Valve's sealing.
- Software Calibration — Hyundai may have released calibration updates for the Palisade's EVAP monitoring.
- Vapor Line Looseness — A fitting may have worked loose from vibration on the larger SUV platform.
Warranty-First Approach
- Check the gas cap — Free step that may resolve the code.
- Visit your Hyundai dealer — Your 2023 Palisade is well within Hyundai's 5-year/60,000-mile basic warranty. EVAP components are covered for 8 years or 80,000 miles. All repairs at no cost.
- Ask about TSBs — Request a check for EVAP-related bulletins.
Costs if Out of Warranty
Gas cap $10–$20, PCSV $140–$280, CCV $110–$250. All covered under your current warranty.