Normal
DTC P0420 and P0430 indicate that the catalytic converters are not functioning properly; your tune may have damaged the cats due to over fueling. Even if you return the tune to stock there’s still an electronic paper trail that it was modified; the dealer will know. Warranty does not cover issues that are attributed to modifications. That includes using anything other than OE spark plugs.I would recommend flashing it back to stock, clearing all DTCs, reinstalling factory plugs, and re-evaluating to see if the issue still occurs.
DTC P0420 and P0430 indicate that the catalytic converters are not functioning properly; your tune may have damaged the cats due to over fueling. Even if you return the tune to stock there’s still an electronic paper trail that it was modified; the dealer will know. Warranty does not cover issues that are attributed to modifications. That includes using anything other than OE spark plugs.
I would recommend flashing it back to stock, clearing all DTCs, reinstalling factory plugs, and re-evaluating to see if the issue still occurs.
