P0442 on Your 2024 Hyundai Sonata: What to Know
The P0442 code on your 2024 Hyundai Sonata indicates the engine control module has detected 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 2024 Sonata features a 1.6L turbocharged four-cylinder engine (standard) or 2.0L turbo (N Line) on Hyundai's N3 platform. Hyundai's EVAP system uses the PCSV, CCV, and FTPS. As a current model year, your Sonata is fully protected by Hyundai's generous warranty.
Possible Causes
- Gas Cap Issue — A loose or cross-threaded cap is the simplest trigger. Check first.
- Software Calibration Update — Hyundai may have ECM updates for the 2024 Sonata's EVAP monitoring.
- PCSV Defect — A factory-defective Purge Control Solenoid Valve.
- CCV Issue — A manufacturing defect in the Canister Close Valve.
- FTPS Calibration — Fuel Tank Pressure Sensor may need calibration refinement.
Warranty-First Approach
- Check the gas cap — Free check that may resolve the code.
- Visit your Hyundai dealer — The 5-year/60,000-mile basic warranty and 8-year/80,000-mile federal emissions warranty cover all P0442 work at no cost.
- Ask about TSBs — Request a check for EVAP-related technical service bulletins.
All work should be at zero cost under warranty.