I have been getting the ENGINE FAULT warning for quite some time now. The first time it happen I took my car to the dealership and they told me the warning did not show on their device. Second time, same thing. Then it did not happen for a long time and the car behaved completely normal. I recently moved to Georgia and the warning has been triggering frequently. Just as the times it came on before, there is a loss of the turbo. I can drive and the engine runs but, power is simply not there.
I have noticed the light always comes on at the same time and place when I am on my way home from work. Also, I have noticed that it comes on when running low on gas. Finally, I have discovered the problem goes away by either opening the tank cap or filling up the tank. It has worked every time since I discovered it.
I am guessing this has to do with pressure in the tank. I think that whenever temperature varies and pressure changes inside the tank a vacuum is created and the light comes on. Can someone give their input? I want to have an idea of what the problem is before I take it to the dealership 150mi away. I am attaching a picture of the warning.

Cheers!

 

Did you just post this identical message in another thread? The answer probably wont change any....