I hope I didn't mess up something else on my car. I currently have the TCU out of the car getting retuned. In the mean time I have been sound deadening the car and today I went to test for rattles and accidentally pushed the key past the on position to start. The ABS and TCS light stayed on which would be expected without the TCU installed but then the display above the odometer said "dEF". Searching online I only seem to see that issue in VW cars and it says to replace the cluster.
I really hope this is just because the TCU is unhooked and can be reset but in the chance that I hurt something by starting the car with it unhooked what should I look for?