P0455 Kia Sorento
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 Sorento 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 Sorento.
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 Sorento.
Common Causes on Kia Sorento
- Gas cap missing or severely worn
- EVAP purge valve stuck open
- Large EVAP vapor line disconnection
- Fuel filler neck gasket complete failure
- Charcoal canister vent solenoid 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 Sorento
Tucson, Sportage, Santa Fe, and Sorento P0455 is typically gas cap or stuck-open purge valve. Easy and inexpensive repair.