I have a 2006 F350 that when driven at lower speeds (under 50 mph) I have no problems. When I get on the interstate and approach 60 MPH the ABS light turns on. Nothing happens to the speedo and the truck appears to run/handle fine. A buddy put a code reader on it the other day and it showed C1155 and C1233. I see it's the speed sensor in the left front tire. My question is, do I have to replace the entire hub assembly (at around $450) or is there an easier way to fix the problem without spending as much? If I slow down and drive around for awhile at speeds under 30 MPH, the ABS light goes off.

 

Check the condition of the wiring to the left front wheel speed sensor for any visible damage and repair as needed. Also check the left/front wheel bearing for any excessive play. If there is any excessive play, you'll need to replace the whole hub and bearing, no ifs ands or buts about it.