What does code P0455 mean on a Genesis and is it safe to drive?
P0455: Evaporative Emission System Leak Detected (Large Leak). Here's what it means on your Genesis, what usually causes it, what repairs typically cost, and how safe it is 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 for your Genesis
- 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 Genesis, repairs for P0455 often fall between $20 and $500, depending on the cause and whether you use OEM or aftermarket parts. Labor rates vary by location.
Known issues on Genesis
Genesis P0455 large EVAP leak follows Hyundai/Kia's diagnosis—gas cap first. On G80 and GV80, the EVAP purge solenoid and its hose connections are the secondary suspects after confirming the cap seals correctly.
Most commonly affected models
G80 2017–2023GV80 2021–2024G70 2019–2023