04 tip. Trans doesn't move.
 

Trying to diagnose it for a friend. Any of you tip guys run into this problem? 04 a6 tip. Can move the shifter into gear but the Car won't move. Only codes I pulled off of it were codes related to a bad coolant temp sensor. But the cel wasnt even illuminated...
When in gear, the car lurches slightly but then just doesn't move. I was thinking maybe a torque converter?