Aftermarket Tunes

[MikeC]

My question is that if there is an engine failure, not necessarily associated with the new tune, the dealership will read out the software program for telltale indicators or modifications. Can the dealership detect the mods made to the software. I've heard claim that some provide "stealth" concerning the modified code. Can anyone verify or explain this. I hate to lose and engine and not be covered, especially if its not the fault of the mod, but proving that fact will be very difficult. Thanks in advance MikeC