Investigating P0455 on Your 2022 Acura TLX
A P0455 on your 2022 TLX (2nd generation) signals a large EVAP leak. Whether you have the 2.0L turbo-4 or the Type S 3.0L turbo V6, the Honda-based EVAP system uses a canister vent shut valve. Your warranty runs through 2026.
Evidence
- Check engine light illuminated
- P0455 stored in ECU
- Possible fuel smell
- Gas cap issue
Causes 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 valve. $100–$240 installed.
- Charcoal Canister (Low-Medium Likelihood): Saturation. $250–$450 installed.
- FTP Sensor (Low Likelihood): False reading. $130–$280 installed.
Diagnostic Path
Replace or tighten the gas cap. Drive 2–3 days. If P0455 returns, Acura HDS diagnostics or a smoke test will locate the leak.
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 turbo performance, SH-AWD, or any TLX features.