Examining P0455 on Your 2022 Lexus IS
A P0455 on your 2022 IS (facelifted XE30) signals a large EVAP leak. The refreshed IS with the IS 300 (2.0L turbo or 3.5L V6) or IS 350 (3.5L V6) uses Toyota/Lexus VSV-based EVAP. Your warranty runs through 2026.
Clues
- Check engine light on
- P0455 stored
- Possible fuel odor
- Gas cap not seating
Causes by Likelihood
- Gas Cap Seal (Very High Likelihood): Loose or worn. $0–$30.
- VSV (Vacuum Switching Valve) (Medium Likelihood): Purge control. $130–$280 installed.
- Charcoal Canister (Medium Likelihood): Saturation. $250–$450 installed.
- Purge Valve (Low-Medium Likelihood): Sticking. $120–$260 installed.
- Vapor Pressure Sensor (Low Likelihood): Faulty. $150–$300 installed.
What to Do
Replace the gas cap and drive 2–3 days. If P0455 returns, Lexus Techstream diagnostics or a smoke test will identify the leak.
Warranty
Lexus' 4yr/50k warranty runs through 2026. Federal emissions (8yr/80k) covers EVAP through 2030.
Safe to Drive?
Yes. P0455 doesn't affect the engine, transmission, RWD/AWD, or F Sport features.