Miata Parts, Intakes, Superchargers, Headers, Exhausts, Shocks, Springs, Sway Bars, Brake Kits, Autocross and track mods.
My 2016 ND has an Edelbrock Supercharger w/their version 5 tune installed. I am getting a random PO421 code. I clear it and it will come back eventually. Anyone else having this problem? Have you found a cure?
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