I have a 2015 kia optima sxl turbo with about 130k miles. A couple of weeks ago the check engine light came on, and its ran like crap ever since. I've been told too many different things about what it could be and im ready to scream.. I took it to a kia dealership and they tell me it's the catalytic converter and for parts and labor it's gonna be $600... now my problem with that is that's almost too good to be true. Cuz if anyone has seen What simply scraping a converter brings- you'd agree that 600 is way off.... i love my car more than life itself and I'm beyond frazzled over the fact I can't get a proper diagnosis much less fixed... can anyone help me?!.!.!!??!