I have a weird one happening. My Q7 3.0 TDI 2014 has had rear main seal replaced. Now the car won't start, it cranks. Funny part is if I take the Crank Speed sensor out of the car it starts.
I changed the sensor same result. VAS coming up with no codes except CSS open circuit (as expected). Even if I connect the CSS and take it out of the slot further away from impulse rotor it starts.
Any one with ideas, please help.