My ABS Light stays on in 2001 F250 Super Duty. Any suggestions as to what might be wrong?

Question

I replaced the ABS Speed Sensor on the rear end. I also have new brakes; so I know its not them. I unhooked the batteries; still stays on. The light comes on; goes off briefly and comes back on and stays on. Would a OBDII code reader diagnoze the problem

Answer 1

To properly pinpoint the cause of the problem would require use of a scan tool that can communicate with the ABS module. As pointed out by Ironhand, attempting to retrieve the DTC from an OBD II code reader will not suffice. Does your speedometer work? If so, that eliminates the rear speed sensor that you've already replaced, as well as a poor main ground connection to the ABS module near left side headlight assembly. As others have posted, either front wheel speed sensors, or the module and/or HCU assembly are other possibilities. But you need to retrieve the Cxxxx code before you can proceed further. Hope this helps.

Answer 2

F250 Abs Light

Answer 3

This Site Might Help You.

RE:
My ABS Light stays on in 2001 F250 Super Duty. Any suggestions as to what might be wrong?
I replaced the ABS Speed Sensor on the rear end. I also have new brakes; so I know its not them. I unhooked the batteries; still stays on. The light comes on; goes off briefly and comes back on and stays on. Would a OBDII code reader diagnoze the problem

Answer 4

It needs to be read by a scanner. Also, there are sensors at the front wheels too. If one of these are bad it will set a code. Think of when this started and see if something happened right then. If it started when the brakes were done it will point you in a direction. I have seen lots of guys running around with that lite on and never figureing it out! A matter of $$$$$!!!!!

Answer 5

Code readers only read computer error codes, and do not diagnose individual components. Hence the name "code scanner/reader"

You may want to unplug the wireing harness at the ABS controler on the inner fenderwell for a few minutes to clear the stored fault code.

It may work, it may not. But it's worth a try.

ADDED: You may have a bad front wheel speed sensor.

Answer 6

The OBD II code reader won't help much. The OBD II diagnostics is for the power train management system only.
You will need something a bit more robust, such as a full-blown scanner, either OEM or perhaps OTC's Genisis or Snap-On's MT 2500 or Modis.
But that is certainly the best place to start.

Answer 7

It could be the speed sensor in the transmission. I dont think a cheep code reader will get abs codes.

Answer 8

Ford has had some O2 sensor problems in the past and it was related to the heated O2 sensors and a wiring issue. I was able to find three TSB's = Technical Service Bulletins that pertained to O2 sensor problems. Suggest that you contact your local dealership and ask if there are any TSB's that apply to your particular vehicle.