P0442 on Your 2024 Hyundai Tucson Explained
The P0442 code on your 2024 Hyundai Tucson indicates the engine control module has detected a small leak in the evaporative emission control system. This system captures fuel vapors from the gas tank, stores them in a charcoal canister, and routes them to the engine for combustion. P0442 flags a leak roughly the size of a 0.020-inch opening.
The 2024 Tucson is built on Hyundai's N3 platform with a 2.5L four-cylinder engine, available in standard, hybrid, and plug-in hybrid configurations. Hyundai's EVAP system uses the Purge Control Solenoid Valve (PCSV), Canister Close Valve (CCV), and Fuel Tank Pressure Sensor (FTPS). Note that hybrid and PHEV models may have modified EVAP monitor timing due to intermittent engine operation.
Possible Causes
- Gas Cap Issue — A loose or cross-threaded gas cap is the simplest trigger. Check this before scheduling service.
- Software Calibration Update — Hyundai may have ECM calibration updates for the 2024 Tucson, particularly for hybrid models where EVAP monitors run less frequently.
- PCSV Factory Defect — A defective Purge Control Solenoid Valve would trigger P0442 on a new vehicle.
- CCV Manufacturing Issue — A Canister Close Valve that does not seal properly from the factory.
- FTPS Calibration Drift — The 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 — Your 5-year/60,000-mile basic warranty and 8-year/80,000-mile federal emissions warranty cover all P0442 work at no cost.
- Mention your powertrain type — If you have a hybrid or PHEV Tucson, let the dealer know, as EVAP diagnostic procedures differ.
- Ask about TSBs — Request a check for EVAP-related technical service bulletins.
All diagnostics and repairs should be at zero cost under warranty.