Abs and traction lights come on randomly...

[AFLiberty12]

Hey. I've had my '12 kk for 2 weeks now and it's happened about three or four times but randomly while braking my ABS and traction lights both come on. When I shut the jeep off they aren't there when I start it back up. My dealer checked for error codes but found nothing (while lights out) but I haven't had a chance to go there with lights on...
has this happened to anyone else? Or any ideas?

 

[ajohns1288]

Is it only the Trac/ABS lights, or is it all the lights in this picture? If its the ESP/BAS and Serv 4WD as well, its probably a wheel speed sensor or associated wiring. Is the dealer reading the codes via the WiTech or just a standard OBDII reader? ABS codes are stored for about 50 key cycles, so they should have shown up when they checked the ABS module for codes.

 

[Spisters]

My 06 started doing that and it was the speed senser. Not sure about newer models, but they had to replace my wheel bearings because the speed sensor is built into them. I thought it would be expensive, but it didn't turn out too bad, less the $300 if I remember correctly.