2004 hyundai Santa Fe GLS AWD 3.5L p0420 and p0306 codes. Need #6 coil but which catalytic converter supports #6 and needs replacement? Thanks!
P0306 might be causing the issue with the catalytic converter, fix the misfire code first.
if you have replaced the sparks plugs already with the correct recommended ones you can replace the coil or swap it with a different cylinder and see if the code moves to the other cylinders
36.2k questions
32.2k answers
1.3k comments
22.8k users