Got some new Toyo's 2 days ago. Replaced 17's with 17's and went up a smidge in width from 235 to 245. Now, when I bank hard into a turn (like a freeway on-ramp), my TCS "slip" light goes crazy for about 10 seconds. It behaves normally when I take off from a stop in the rain, and regular street turns I can still fly through them, but broad turns going fast sets it off. Anyone else have this problem and how do I fix it?

 

You may have thrown it off a bit because of the different diameter. The TCS depends on a certain ratio of front/rear diameter to work properly. There is a small range that it works in and you may be close to being out of that range.

Check the Wheels/Tires forum, there is a sticky posting at the top that contains info on how to pick tire sizes.