Nah. I've recently had a powerfc installed and I don't have any problems with it. My slip light and A-LSD/ABS lights are working fine. Not that I have tested them of course. :angel:
I seem to find that it creates a system fault when you are driving up an uneven driveway and one wheel spins but the other is off the ground? Or on a dyno. It comes up with a system fault. Not quite sure why, but my mechanic said it's fine