This is just a heads up for these engine codes if someone is searching for answers in the future. My car had been throwing these codes for months, but I've been so stressed for time that I never got around to trying to fix it until today. And boy, was it an easy fix
Car: 2002 Sentra Spec-V
Engine: QR25DE
Service Engine Codes:
0455: Evaporative emissions (EVAP) control system leak detected (no purge flow or large leak)1448: Vent control valve
Solution: I ended up replacing the stock gas cap with a $15 locking gas cap from Checker and it cleared the codes.
