Originally Posted by Zsteve

unless it, the ECU, keeps track of the dates it was changed. Kinda like a computer that gets updates every so often, they are tracked by dates. Im sure if they wanted to know they could make it so. Look at Toyota and their black box, they wont let anyone look at it cuz its tracking all kinds of ****.

And like a computer Im sure even though you wrote over one with another, its still traceable on the memory device.

But that shouldnt stop any warrenty work unless they can prove the tune was the cause, they shouldnt be reading the ECU just for the heck of it.