Check engine issue need help please

[Monnk13]

Hi, I have a 2019 civic si with a PRL cobra cold air intake (street maf) and a hondata CARB +6 base tune. I installed the flashpro about a week ago. Today I received check engine code(p0420) saying there was an emissions problem. How is this possible? I have a street maf and a carb exempt tune. Has anyone had this problem, or can you offer a solution to this? I cleared the code once this morning, drove the car about 40 miles and it came back on. Any help is appreciated.

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[Troy Jollimore]

Hondata would be the ones to contact with that question. Are you driving aggressively or normally when the code comes up?