Uncovering P0440 on Your 2022 Hyundai Tucson
Your 2022 Hyundai Tucson — the first year of the fourth generation on the N3 platform — has set a P0440 code. The 2.5L Smartstream engine pairs with a modern EVAP system. As a first-year design, certain early-production issues are possible alongside standard EVAP failures. Let's investigate.
Symptoms
- Check engine light on
- Possible fuel smell
- Marginal fuel economy decrease
- Fueling difficulties
- Emissions failure
Your Tucson performs normally. Engine, transmission, and AWD are unaffected.
Ranked Causes
- Gas Cap — Loose or worn. Estimated repair: $5–$25.
- Purge Control Solenoid Valve — Known Hyundai EVAP failure. Estimated repair: $75–$190.
- Canister Close Valve — Vent control component. Estimated repair: $85–$210.
- Vapor Line Connection — First-year platform may have loose connections. Estimated repair: $40–$130.
- Fuel Tank Pressure Sensor — Can report incorrect data. Estimated repair: $95–$240.
Diagnosis
- Check and tighten gas cap, clear code
- Scan for all EVAP codes
- Test PCSV and CCV
- Smoke test for leaks
- Check for Hyundai TSBs
Costs
- Gas cap: $5–$25
- PCSV: $75–$190
- CCV: $85–$210
- Vapor line: $40–$130
- FTP sensor: $95–$240
- Diagnostic: $80–$150
Warranty: Check your mileage against Hyundai's 5-year/60,000-mile basic warranty.
Safe to Drive?
Yes. P0440 is completely safe with no performance impact.
Repair Approach
Check warranty first. If covered, visit the dealer for free repair. If expired, the gas cap and PCSV are moderate DIY jobs.