rotation flips 180° with Auto orient to path

Hi,

I'm animating a car using "auto orient along path." On one Frame, while turning around a corner, the car layer suddenly flips 180° around it's x-axis and back on the next frame. I know this kind of behavior from 3D Apps, where I usually fix the problem by defining an up-vector. But i can't figure out how to do this in AE.

Any help would be greatly appreciated.