No alwheel drive light says allwheel off versatrac needs service vue has 25000 miles

How many miles are on the vehicle since the last time the brakes were serviced? Are the brakes squealing? Are the rotors worn out of tolerance, brake pads shot, etc.?

What is the condition of the wheel bearings? Do you experience any "chatter" or slop in the front end when braking or driving? Jack the front end off the ground. Grab tire at 12 & 6 O-Clock and alternate pushing and pulling. Do the same at 3 & 9. Do you feel clunking or any play at all? If yes, then the sensors can often pick this up and interpret it as a loss of traction. Wheel bearings will need to be replaced, and potentially tie rod ends, and/or ball joints.

ABS brake sensors can be loose, bad, have broken wires, or simply "gunked" up with grease, oils and brake dust. If they can't read the tone ring, the result will be an ABS fault to the computer. Inspect integrity and/or try cleaning completely.

ABS Tone Ring could have broken or missing cogs/teeth. Although a bit more rare, this can happen if you have not properly maintained wheel bearings, tie rod ends, ball joints, etc., and/or have hit large rocks or pot holes while driving.

Once these items are inspected, then you'll need to take your vehicle to a service center to have the faults reset.

The service ABS light on while driving means that the ABS wheel speed sensor is defective or a broken wire that goes to the sensor. You now only have regular braking. This means that you can now lock up one or more wheels with hard braking. Then the car can swerve either left or right while braking hard. The traction control must also rely on the ABS wheel speed sensor to keep both front wheels spinning at the same speed for safety reasons. This prevents loss of control of your car while getting better traction with the tires.

The abs makes the traction control work so fix the ABS first. The most common thing thea haqppens are the wheel speed sensers fail. In the front wheels the speed senser is incorperated into the front wheel bearing. these bearings are well known to fail at about 100 thousand miles and can fail aqs early as 80 thousand miles and most all of them fail before 140. You might notice a roaring sound ( like noisiy treaded tires) You can jack up one front wheel at a time and get in the car as your driving it and put the car in gear and run the car ( not moving but thwe trie is turing and listen for noise. I fht e wheel makes a roaring sound that gets worse as you go faster that wheel bearing is bad. Don't go over about 50 as with one tire on the groung the other that is turning, is going twice that fast or 100 MPH at 50 on the speedometer. Do the same test on the other wheel and if it's quiter or quite just change the noisy one. Once changed you just drive the car and the new wheel speed senmser will be reconized and the ABS light will go out as will the trac off light. If your ready to change both wheel bearings do so as they both have the same miles on them just not nessarily the same potholes and other rough pavement that makes them wear out faster. If thebearings are quite then you need to inspect the wires coming outr of the back of the wheel bearing.. Thjese wires get into troble and get unplugged or break the wire. If you havwe asscess to a scasnner that will address ABS systems it'll point out the ABS problem. Things that happen other than the wheel speed sensers are fuses blown for other reasons. The accumulater motor failure or extreamly cold weather the accumulate motor locks up in cold and blows the fuse. Thwe motors seldom fail but they can and do. Some veicals are nerer serviced and the brake fluild accumulates moisture ( as it's supossed to) and peaple never get the brakeing system seviced and the old brake fluild can freeze in cold weather and start croduing things. The Traction control sysem uses the brakes to control wheel spin by puting on the brake on the spinning wheel. If the system notices a wheel spinning. (Using the wheel speed sensers) So until the ABS is fixed don't try to fix the traction control system as it truly is part of the ABS systyem.

If ABS light is on,you still have base brakes,just like an older vehicle with no ABS.Not a problem,as a matter of fact I always disable the ABS on my vehicles because I don't like it.

there should be a tag on your differentials front and rear clean them up and check to see if the ratios match

Every 500 miles, no, if you meant 5000 then yes, but if the inside is extremely worn down that sounds more like an alignment issue. If it was just a rotation issue, then the front tires would most likely be the ones worn down the most, but they should still be evenly worn across the tread. Also, i wouldnt take it to the dealership unless you just want to spend more than you have to, ask around, find a reputable shop, anything but the dealerships.

scan the computor for errors

no you need to take it and have the codes pulled on it, the abs system will disable the traction control system.Without knowing what the codes are for the abs system it would not be possible to say what the problem is.

It may just new brakes, pull the ABS fuse and see if the problem still exists, if it does then it's not a ABS problem

have the fronts been done recently