i used to have hicas problems and power steering problems in my r32
i was told the problem could be the hicas computer, boss kit, not enough power, power steering pump, solenoid on power steering rack, blockage in fluid lines, ecu wiring
had it all looked at and auto electrician nailed it down to the hicas ecu giving the solenoid the signal to close
ive heard alot of people have had just hicas problems due to the steering sensor so if u got an arfter market steering wheel or ur wheel isnt on straight? maybe change them back?