won't spin, ul code

Washer Repair
1

Help, keep getting ul code during spin cycle, already have taken apart and clean up any corrosion that may have built up, there was hardly any, step two, removed and replaced suspension spring kit, worked for three days now it right back to the ul code, what is next, bearing? does make some grinding noise when inner tub is moving or faulty sensor, does it with or woth out clothes