Hello I get an occasional code 0CF1 does anybody know what this means?

Also the steering is wayward, turn the steering wheel continuously and sometimes the steering wheels stop moving momentaraly, I suspected the ram was faulty so swapped the axle with another truck I had in pieces and the fault is gone.

Ive had the steering ram resealed and fitted the axle to another truck and l have the same problem, if i disconect the steering potentiometer the steering is fine but I obviously get a potentiometer fault.

How does the potentiometer effect oil movement?

Thanks