Solving P0455 on Your 2022 Toyota 4Runner
A P0455 on your 2022 Toyota 4Runner means the EVAP system detected a large leak. Your 5th-generation 4Runner with the 4.0L V6 may still be within Toyota's basic warranty. Start with the gas cap—always the #1 suspect.
Symptoms
- Check engine light with P0455
- Faint fuel odor
- Gas cap not sealing properly
- Emissions test failure
Causes by Likelihood
- Gas Cap Seal (Very High Likelihood): Loose or worn. $10–$20 OEM replacement.
- Canister Close Valve (CCV) (Medium Likelihood): Vent valve sticking. $150–$260.
- EVAP Hose (Medium Likelihood): Cracked or damaged line. $80–$240.
- Charcoal Canister (Low Likelihood): Damage or saturation. $200–$400.
- Purge VSV (Low Likelihood): Vacuum switching valve. $100–$220.
What to Do
Tighten the gas cap and drive 2–3 days. If P0455 returns, visit a Toyota dealer for Techstream diagnostics and smoke testing.
Warranty Status
Toyota's basic warranty (3yr/36k) runs through 2025. The federal emissions warranty (8yr/80k) covers EVAP through 2030.
Safe to Drive?
Yes. P0455 doesn't affect the 4Runner's 4.0L V6, 4WD, or off-road features.