P0455 Kia Telluride
EVAP System Leak Detected (Gross Leak) · Powertrain Code · Medium · Repair: Easy
What is P0455?
A large leak has been detected in the EVAP system. Check gas cap first — if secure, look for disconnected or cracked EVAP hoses, a stuck-open purge valve, or a leaking charcoal canister.
When the Kia Telluride triggers code P0455 (evap system leak detected (gross leak)), it typically points to an issue in the powertrain system. Below you'll find the most common causes, symptoms, and repair options specific to the Kia Telluride.
This repair is rated easy, meaning basic tools, no lift needed.
Diagnostic data on this page is compiled from publicly available repair resources and technical service bulletins. Always have a qualified mechanic confirm the diagnosis before authorizing repairs on your Kia Telluride.
Common Causes on Kia Telluride
- Gas cap missing or not engaging
- EVAP purge valve stuck wide open
- Large EVAP vapor line crack along frame rail
- Fuel tank seal failure at pump module
- Charcoal canister vent valve stuck open
Symptoms
- Check engine light illuminated
- Noticeable fuel smell near vehicle
- Gas cap warning light on dashboard
- Failed emissions test
- Fuel economy noticeably decreased
Notes for Kia Telluride
Palisade and Telluride have longer EVAP line routing. Inspect full line runs during smoke testing for P0455.