I have never heard of any sensor that only a dealer can acess. I think someone did not want to look at your car.
Go to another shop.
The first thing I would look at is the fluid level and condition. If it is low, it will whine. If the fuild is filthy, it will be thick and do the same thing. Changing it is a must at about 50-60k.
Start with the basics first before going more complicated.
Monday, November 7th, 2011 AT 2:45 AM