Definitely sounds like a wheel speed sensor or
wiring problem as mentioned above. The ABS
computer will run a diagnosis on the ABS system
with the exception of the ABS pump and modulator
assembly. When you shift into gear and the vehicle
starts moving the ABS computer tests the pump
and modulator assembly. So if the ABS light and
traction control light come on at start up and remain
on it's a wheel sensor or wiring problem. But if the
lights come on for a few seconds at start up then go
out and stay out until the vehicle starts moving, it's
the pump and modulator assembly. The ABS and
traction control systems work together. So if the
computer finds a problem in the ABS the traction
control system is also disabled. Both lights come on
to let you know both systems are disabled. Another
thing to remember is the ABS computer doesn't
store trouble codes. In order to get a trouble code
out of the ABS computer the ABS light on the dash
must be on when the computer is scanned. Shutting
off the ignition will clear the ABS computer until the
next time you start the engine and the ABS light
comes on and stays on. Hope that helps! Jim
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