Resolving Hyundai EVAP Issue

Sept. 25, 2023
Certain 2012-2016 Hyundai Veloster vehicles equipped with a 1.6L GDI engine may experience a check engine light.

Certain 2012-2016 Hyundai Veloster vehicles equipped with a 1.6L GDI engine may experience a check engine light with the following DTCs:

- P0455 (evaporative emission system large leak) 

- P0456 (EVAP very small leak)

- P0449 (canister closed valve...CCV...restricted vent circuit)

- P0451 (fuel tank PSI sensor range performance)

There may be no drivability symptoms associated with these DTCs. Replace the Air Drain case (also referred to as canister vent filter). The previous air drain case is P/N 31035-2K500. The new and modified P/N is 31035-B2500FFF.

Remove the fuel filler neck assembly. Remove the retaining clip from the air drain case using a flathead screwdriver. Pull the hose to remove the air drain case from the filler neck. Release the clamp using pliers and remove the air drain case.
Install the new/improved air drain case. Reinstall all parts in reverse order. Connect the GDS and perform the Evap Leakage Test to ensure a result of No Leak Detected. This will confirm proper installation and that the original P0455 condition has been resolved. 
About the Author

Information courtesy of Mitchell 1

Information for Technical Service Bulletins comes from ProDemand, Mitchell 1's auto repair information software for domestic and import vehicles. Headquartered in San Diego, Mitchell 1 has provided quality repair information solutions to the automotive industry since 1918.

Sponsored Recommendations

Garage Tip: The Value of System Solutions

Learn why inspecting related parts when repairing your vehicle can save you time and money. Avoid future failures and ensure satisfaction! Click to watch now.

Access the Best Learning Resource for Professional Mechanics

Get hands-on tips, updated repair instructions, mounting videos, failure diagnosis, and best practices for professional mechanics. Click to access essential technical info to ...

From the Basics to Innovations - Transmission Technical Training Videos

Explore Schaeffler's portfolio of transmission technical trainings for the LuK brand. Tailored for all skill levels, our modules cover basics to innovations. Click to learn more...

Clutch Release Problems - Diagnosis & Failure Analysis

Explore common clutch release problems and their causes, from hydraulic issues to mechanical faults. Understand diagnostics and solutions for optimal clutch performance.

Voice Your Opinion!

To join the conversation, and become an exclusive member of Vehicle Service Pros, create an account today!