Pontiac Repair: abs and tcs lights on when temperature gets above 60, pontiac grand prix, 3800 engine

Question
What can cause abs and traction control sytems to shut down when outside temperature gets above 60. The operating temperature of the vehicle doesn't seem to have any influence just outside air temperature. I have a 2005 pontiac grand prix with the 3800 engine without turbo.50's lights are off above sixty they come on.

Answer
Hey Donald:

well the most likely cause to this problem would be a speed sesnor on one of the wheels. either the sensor's resitance is right on the brink of being bad and with the increased temp it take it over the top of one of the sensors is shorted out to ground. That is the only real problem that car has is speed sesnors. You will have to get the car scanned for codes to be sure but my guess is one of them is bad.