Most probably because one of the speed sensors not functioning. but the best way to know for sure is to hook up the vehicle to a scanner and it will give u a code that will point you to the right direction.
1987 Ford F350 want stay running
How old do you have to be to make a facebook.And please DONT say 13!
Have vehicle scanned to determine the problem - usually in the emission control system
So that the glow plugs have time to work.
Your anti-lock brake system has a failing or failed component in it. Usually this is rather expensive to fix.
check brake light fuse and brake light switch on pedal
Either the cap isn't on tight, the seal is bad or some other part of the tank is leaking air.
A problem with the Anti-lock Brake System has been detected : It could be a fuse , a sensor , or some other problem As long as the red " BRAKE " light in your dash is not on , you still have " normal " brakes
because you have an emmissions problem
check the brake light switch
lOW COOLANT OR BAD SENSOR
why does my check engine light stay on and want go off