rack and pinion was repaired, and after that the check engine light is on?

Hello,

Plugging that harness into the pressure switch is fairly straight forward.
Only tricky part is to be able to reach the sensor.
That pressure switch is located next to where the steering shaft meets the rack (see diagram below).
You might have to raise the vehicle in order to access it.

You will have to clear the code after you plug the harness back in.

https://youtu.be/ahK_eucFi-k

I have attached the diagrams for your reference.

Please let me know of any questions.
Thank you.