Steering issue.

Going through a steering problem guys. 54 plate vrs and the steering is mega heavy right and light to the left. Got a pull to the left as well.

Could it be this steering angle sensor? No faults on dash etc and just passed mot In December and only slight play in the track rod end and that's it. Mechanical or electrical? Battery is 80% charged according to halfords that tested it but the lights "dim" when you steer a fair bit so thinking battery or sensor?