Flashing
 

Does the dealer know if you've flashed your ECU when they hook up to it?

im tellin kevin!!! haha just messin

they might know..but some dealers flash the ECU themselves for certian updates and etc. so i think you should be okay..

If you flash it back to stock there should be no way for them to tell

after a flash they could find out, but they have no need to. If you have them check out why your check engine is on, they wont know, its a seperate program.

Thanks fellas

There are people on EvoM that have said that they had their ECU's flashed back to stock and when they brought their car back into the dealership, the dealership knew. I'm guessing they were having something major warrentied, otherwise the dealership wouldnt check.

minor stuff they dont check major stuff they might thats why you do all your own stuff