2021 Kia P0455: What It Means & Is It Safe to Drive?
P0455 on the 2021 Kia: 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 2021 Kia
- 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 2021 Kia, repairs for P0455 typically fall between $20 and $500, depending on the root cause and labor rates in your area.
Known issues on Kia
Kia P0455 follows the same pattern as Hyundai. Gas cap first; if that's fine, check the EVAP canister hoses and canister body itself for cracks, especially on older Sorento and Sportage models.
Most commonly affected models
Optima 2006–2015Sportage 2005–2015Sorento 2003–2015