Tracking Down P0440 on Your 2022 Hyundai Santa Fe
Your 2022 Hyundai Santa Fe has flagged a P0440 code — an EVAP system malfunction. The refreshed Santa Fe on the N3 platform uses the 2.5L Smartstream engine (191 hp) or 2.5L turbo (281 hp). The EVAP system has been updated for this generation. Let's examine the suspects.
Symptoms
- Check engine light on
- Possible fuel smell
- Slight MPG decrease
- Fueling issues
- Emissions failure
Your Santa Fe performs normally. Engine, 8-speed DCT/automatic, and AWD are unaffected.
Ranked Causes
- Gas Cap — First check. Estimated repair: $5–$25.
- Purge Control Solenoid Valve — Smartstream PCSV failure. Estimated repair: $75–$195.
- Canister Close Valve — Vent control. Estimated repair: $85–$215.
- Vapor Line Issue — Loose or cracked connection. Estimated repair: $40–$135.
- Charcoal Canister — If fuel has been overfilled repeatedly. Estimated repair: $200–$460.
Diagnosis
- Gas cap check/replacement
- Full EVAP scan
- Component testing
- Smoke test
Costs
- Gas cap: $5–$25
- PCSV: $75–$195
- CCV: $85–$215
- Vapor line: $40–$135
- Canister: $200–$460
- Diagnostic: $80–$150
Warranty: Check mileage against Hyundai's 5-year/60,000-mile warranty.
Safe to Drive?
Yes. No concerns.
Repair Approach
Check warranty first. If covered, use the dealer. If not, gas cap and PCSV are moderate DIY jobs.