2019 Honda P0455: What It Means & Is It Safe to Drive?
P0455 on the 2019 Honda: 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 2019 Honda
- 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 2019 Honda, repairs for P0455 typically fall between $20 and $500, depending on the root cause and labor rates in your area.
Known issues on Honda
Honda P0455 usually means a missing or damaged gas cap, or a disconnected/cracked large-diameter EVAP hose. Check the hose running from the fuel tank to the charcoal canister for splits before purchasing parts.
Most commonly affected models
Accord 2003–2012Civic 2006–2015Pilot 2003–2012