catalyst system below threshold bank 1

catalyst system below threshold bank 1 1 Answer

I have a 2004 Hyundai Elantra with two catalytic converters. Should I replace the first or the second, or both to fix the error code?

I have a 2005 Hyundai Elantra we are getting code P0420 Catalyst system efficiency below threshold bank 1, do you have any idea on what we should check or change first on this car? 3 Answers

Cooling system 1 Answer

06 elantra. Both fans turn on but on the cooling fan side 1/2 of the blows hot air off of the radiator. Both hoses are hot but... Any ideas cause its trying to overheat but goes back down when I m...

Coolant System Flush 1 Answer

I'm getting ready to replace the heater core in my car. I've managed to play around with the dashboard panel enough to figure out how to actually get everything apart correctly. However, I don't ...

Will resetting the navigation system affect my warranty? 3 Answers

My sound won't work and I saw somewhere that you can either reset the fuse or use a paperclip to reset the navigation system but before I do this I want to make sure this won't void my warranty in ...