Hi. This is my first post, and please excuse me if I'm asking something that has been answered numerous times before. I have a '99 S70 GLT with the notorious ABS malfunction, giving me a P1550 (wheel speed sensor) code. From what I've read, the controller is almost always the culprit, but I just wanted to make sure before I spend any money.
When the ABS unit goes bad, will the speedometer and odometer always malfuntion? I seem to have all of the symptoms except for that. My Cruise Control stops working, ABS and Traction lights come on, the transmission seems to shift differently, the RPMs take much longer to come back down... But I've also had the ABS kick in when it shouldn't, just under normal braking conditions, and I've heard this is more of a sensor issue, but I could definitely see that also being a controller issue. Thanks for any help!
Last edited by matthew1
on 25 May 2012, 20:23, edited 1 time in total.
Reason: Edited title. Removed extra ? marks.
1991 240, 209k
1999 S70 GLT, 140k