Hello and welcome.
There is no steering wheel angle sensor.
The PSCM calculates angle by inputs form the motor rotational sensor and the torque sensor.
After replacing these parts, you may just need to do a relearn of the system.
The PSCM needs to be programmed, as well as the steering position, torque sensor calibration, and steering centering position calibration in the EBCM.
Sounds like it is all in the programming.
I looked a little deeper, and came up with a bulletin. This is what it states...
After the software has been updated, perform the following checks using the Tech 2®:
If any of the above checks are incorrect, perform the following procedure using the Tech 2®: