2005 Acura P0455: What It Means & Is It Safe to Drive?
P0455 on the 2005 Acura: Evaporative Emission System Leak Detected (Large Leak). Here's what it means, what usually causes it, what repairs typically cost, and whether it's safe to keep driving.
PowertrainMedium urgency
What this code means
A large leak has been detected in the EVAP system. Could be gas cap left off, disconnected hose, or damaged canister.
Common causes on the 2005 Acura
- Gas cap missing or not sealed
- Disconnected or ruptured EVAP hose
- Damaged charcoal canister
- Faulty purge/vent solenoid
Symptoms
- Check Engine Light
- Fuel smell possible
Typical fixes
- Install or replace gas cap
- Inspect and repair EVAP hoses
- Replace canister or valves as needed
Repair cost range
For a 2005 Acura, repairs for P0455 typically fall between $20 and $500, depending on the root cause and labor rates in your area.
Known issues on Acura
Acura P0455 follows Honda's diagnosis—start with the gas cap. On MDX and TL with the 3.5L J35, the large EVAP hose from the fuel tank to the charcoal canister is prone to cracking at the tank fitting on high-mileage examples.
Most commonly affected models
MDX 2007–2013TL 2004–2008TSX 2004–2008