Solving P0455 on Your 2024 Subaru WRX
A P0455 on your 2024 WRX means the ECM found a large EVAP leak. Your 271-hp 2.4L turbo boxer is fully under warranty. The gas cap is the most common cause—check it first.
Evidence
- Check engine light illuminated
- P0455 stored
- Possible fuel odor
- Gas cap not seating
Top 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): Assembly issue. Warranty-covered.
- ECM Calibration (Low Likelihood): Software update. Warranty-covered.
What to Do
Tighten the gas cap and drive 2–3 days. If P0455 returns, visit your Subaru dealer for free warranty repair.
Warranty
Your 2024 WRX is fully covered by Subaru's 3-year/36,000-mile warranty through 2027. Federal emissions warranty (8yr/80k) extends through 2032. Note: aftermarket modifications may affect warranty coverage.
Safe to Drive?
Yes. P0455 doesn't affect the 2.4L turbo, 6-speed manual or SPT CVT, Symmetrical AWD, or performance.