OFT Tunes and Dealers
 

Im just wondering if Off-the-shelf OFT tunes are detectable by dealers even after I flash on the stock tune. Will they be able to see that I messed with the ECU?

Thanks

There is no evidence supporting the dealer being able to see any flashing has occurred, if you flash back to stock tune.

Even if you don't flash back to stock, a tune isn't something they go looking for unless you're there with a problem.

That's what I'm worried about. Incase I want to claim warranty in the future.

There ARE ways/means to check if it has been flashed. But from what many say, average dealerships don't have skills/knowledge/tools (or eagerness?) to find it out, so most probably flashing back stock tune prior visit is safe for 99.99%.

but if you flash it back to stock and have a check engine light by the time you get there, getting a different code than the one that landed you to the dealership, aren't they going to suspect something?

The short answer is no...
 

Once you flash back to stock, they can only tell how many miles have been driven since the ECU was last flashed and or reset. If they ask, you can simply say that the battery died cause you left the lights on.

Jaden