Originally Posted by labedra
... I hooked up my laptop with Auterra Dyno Scan latest edition to check for any old and any new DTC errors in cars memory and nothing. Everything is empty. So I can confirm that this mod DOES NOT THROW any codes as the rummor goes around.
This is not quite correct. It throws a code "exhaust flap is open" or something (I don't have it on me now, but you can see it with the BT tool) but it also says "CEL light will NOT turn on", so it's not a major code. I've had it open for about 7 months now, quite lovin' it, and the last time I went to the dealer, they even updated my software (i.e. they certainly saw the code) and didn't care.