for brake pads ,check pads if ok you either have a faulty caliper or broken wire ...for high oil tilt cab and check on dipstick ,and compare it to the dip display ,may need calibrating or a new sensor..for the warning light ,,can be a million things ,best bet go to dealer and get fault codes read ,,though it will be a stored error,you may haver to get them all cleared and go back when the light comes on to find the true fault code
norb
January 2012