2020 Hyundai P0455: What It Means & Is It Safe to Drive?
P0455 on the 2020 Hyundai: 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 2020 Hyundai
- 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 2020 Hyundai, repairs for P0455 typically fall between $20 and $500, depending on the root cause and labor rates in your area.
Known issues on Hyundai
P0455 on Hyundai means a gross EVAP leak—start with the gas cap. If the cap is intact, the large EVAP hose from the tank to the charcoal canister is the next most common failure point on these models.
Most commonly affected models
Sonata 2006–2015Elantra 2007–2016Santa Fe 2007–2012