Certain 2012-2016 Hyundai Veloster vehicles equipped with a 1.6L GDI engine may experience a check engine light with the following DTCs:- P0455 (evaporative emission system large leak)
- P0456 (EVAP very small leak)
- P0449 (canister closed valve...CCV...restricted vent circuit)
- P0451 (fuel tank PSI sensor range performance)
There may be no drivability symptoms associated with these DTCs. Replace the Air Drain case (also referred to as canister vent filter). The previous air drain case is P/N 31035-2K500. The new and modified P/N is 31035-B2500FFF.