My Prius with 114k miles. Has been parked for past few month. I keep rolling it for 10 minutes every week to keep the battery functions going. . I noticed the traction control light has been on. No other lights on dash. Drives just fine Is there any fuse or relay that I can check.
10 minutes a week is not enough. Your 12 V battery may be getting weak. Need to "pull the codes" to get a better idea.
Put a 4 amp or less charger on the 12v battery overnight. Make sure it's fully charged. Get a code ready that will also read the ABS system. And see what code you get. Maybe charging up the 12v battery will resolve your problem. 10 minutes a week is just wasting your time. DRIVE the car for 30 minutes every week. Having a car sit is not good for any car.
Or if you don't have such a reader (I think 'ready' was meant to be 'reader'), you can use a short skinny jumper wire and get your brake and traction codes by counting light blinks. It is often handy to know how to do that, because it is easy to have warning lights come on when you don't have a code reader with you, and for systems like your brakes, it is good not to have to put off finding out what the trouble codes are.
