Understanding P0455 on Your 2024 Subaru Impreza
A P0455 on your redesigned 2024 Impreza means the ECM detected a large EVAP leak. The 2024 Impreza is now hatchback-only with the 2.5L boxer engine. Everything is under warranty—check the gas cap first.
Symptoms
- Check engine light with P0455
- Possible faint fuel odor
- Gas cap not seating
- EVAP monitor incomplete
Likely Causes
- Gas Cap Seal (Very High Likelihood): Loose or factory defect. Warranty-covered.
- Purge Control Solenoid (Medium Likelihood): Manufacturing issue. Warranty-covered.
- Vent Control Valve (Medium Likelihood): Factory defect. Warranty-covered.
- Vapor Line (Low Likelihood): Loose connection. Warranty-covered.
- ECM Software (Low Likelihood): Calibration update may be needed. Warranty-covered.
What to Do
Tighten the gas cap and drive 2–3 days. If P0455 persists, visit your Subaru dealer. All repairs are covered under warranty.
Warranty
Your 2024 Impreza is fully covered by Subaru's 3-year/36,000-mile warranty through 2027. The federal emissions warranty (8yr/80k) extends through 2032.
Safe to Drive?
Yes. P0455 is a vapor code. The 2.5L boxer, Lineartronic CVT, Symmetrical AWD, and EyeSight all function normally.