Pursuing P0455 on Your 2022 Acura MDX
A P0455 on your 2022 MDX (4th generation YE1) indicates a large EVAP leak. Whether you have the 3.5L V6 or the Type S 3.0L turbo V6, the Honda-based EVAP system uses a canister vent shut valve. Your warranty runs through 2026.
Clues
- Check engine light illuminated
- P0455 stored in ECU
- Possible fuel smell
- Gas cap not clicking
Suspects by Likelihood
- Gas Cap Seal (Very High Likelihood): Loose or worn. $0–$25.
- Canister Vent Shut Valve (Medium Likelihood): Honda/Acura EVAP valve. $120–$260 installed.
- Purge Solenoid (Medium Likelihood): Sticking. $100–$240 installed.
- Charcoal Canister (Low-Medium Likelihood): Saturation. $250–$450 installed.
- FTP Sensor (Low Likelihood): Fuel tank pressure sensor fault. $130–$280 installed.
Diagnostic Approach
Gas cap first. Drive 2–3 days. If P0455 returns, your Acura dealer with HDS (Honda Diagnostic System) will identify the fault. A smoke test also works well.
Warranty
Acura's 4yr/50k warranty runs through 2026. Federal emissions (8yr/80k) covers EVAP through 2030.
Safe to Drive?
Yes. P0455 doesn't affect the V6, SH-AWD, towing, or any MDX features.