So I'm new to Volvo's but from what I've seen, my issue is a common one. I have all the symptoms of a bad ABS/STC Module; Like "brake failure stop safely asap" ABS light, STC light, loss of tach and speedo and some sort of limp mode. Occasionally a "Transmission service required" message. I turn the car off, and everything seems fine until I hit about 20 mph and then it starts all over again.

I have tried 3 different ABS/STC Modules including a BBA Reman that I just purchased, but I'm still having the same issues.

Any ideas on what I should check for next ??