What information should I expect from a dealer engine diagonostic?
Depends on the problem you are experiencing. If there is an engine fault code showing up they will read that and be able to tell you what the ECU of the car is saying the issue is related to. From this they can start troubleshooting and eliminating items to get to the real cause. Nowadays these code readers can be picked up for 30-40 dollars and you can almost diagnose your vehicle yourself and be as far along as the dealer after a few moments of time.
