+18 2013 Hyundai Accent Check Engine Light Code P0420 References. The light turns on when you switch on the ignition key and then it. Web code p0420 check engine light on fix hyundai kia, catalytic converter fixif you have hyundai sonata and you have check engine light and code p0420 catalyst e.
This can happen for multiple reasons and a mechanic needs to diagnose the specific cause for this code to be triggered in your situation. Web obd code p0420 is an extremely common indicator of an issue with the operating efficiency of your hyundai accent's catalytic converter, so it's letting you know by flipping on the check engine light (hopefully before you fail an emissions test). Web indicator status and severity.
