Built AMU engine, new timing belt.
AEB head.

Engine runs smooth, but 17748 code (cam/crank sensor incorrect correlation) remains and comes back immediately after erase

Checked timing again yesterday:

- With crank pulley at TDC mark, and exhaust cam sprocket mark lined up with valve cover mark, the CAM marks (squares) are OFF!
- Moved crank until CAM marks line up with triangles (on cam holders), then cam sprocket/belt is off by 3.5 teeth

Do I have the wrong cam sprocket?

Or is the cam sprocket installed the wrong way?

There is a timing mark on the other face of the cam sprocket.
The part number stamped (facing outside) is 027 101 111 H.

4 hole cam sensor installed (and swapped/tested) (vs. AEB cam sensor with 1 hole).

Block is built AMU (TT225), head is AEB.