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04/11/2021 7:57 pm
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Hi Scotty. I have a 2016 hyundai sonata with 238000 miles. Runs great but I keep getting the P0420 code. I've already changed both catalytic converters, both oxygen sensors, spark plugs and coils, and still the code keeps coming up.
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04/11/2021 8:17 pm
Did you diagnose all the above parts to be faulty before replacement?
Pray it’s not the ECM -
https://www.autocodes.com/p0420_hyundai.html
