2004 Kia Optima Q&A

2004 Kia Optima Question: engine light is staying on

I have the carmd and it is telling me the reason for light is gas cap. I replace cap and had it reset at a local kia dealer. Now 2 weeks later light comes back on with it stating the same problem. Anybody out there having the same problem. kia states it is also the gas cap. inspected gas cap and it is in perfect condition -
Answer 1
Kia as a car manufacturer put a lot of great technical information and work shop manuals on line for free for Kia owners. www.kiatechinfo.com I'm sure it some sort of an evaporative emission control problem but what is the exact code they found. -
Comment 1
P0455 is the code that came up. thanks for replying -
Related Items:
I went to turn my car off and the engine wouldnt shut down and the dash lights stayed on. The key can alson be remove and the car still wont shut off
I turned my car on and the malfunction indicator turned on as I was driving. I checked the fuel cap and it was on right, what else can it be, or what do I need to do to to fix the problem? Thank you