it's a 2000 gs 300. I have owned this vehicle for 6 months. no modifications as far as I know. 165 500 miles. I have not disconnected the battery or have done anything to the vehicle. it did not act like this for the first 2 months that I have owned the car. I have taken it to an automotive repair shop and the dealership. both have done diagnostics and scanned the car and no codes have came back, and no vehicle lights on the dash. the dealership said it was normal, but it's not normal because it did not do it when I first bought the car.
thank you for your help.