The engine, ABS & TCS lights are on again on my 99TL with 95k. I've had this car for 1 year and the lights come on in the winter. Lights go off in the summer. Any ideas what the problem may be?

 

One or more of your abs wheel sensors are acting up. When you start the car, the system checks and if one of the sensors have low voltage or is not reading correctly the abs wheel sensor then triggers the abs light which in turn triggers the tcs light which in turn triggers the check engine light. Just check the sensors for continuity with a voltage testor. I had the same problem a month ago turned out to be a slight pinch in the front passenger wheel sensor. Good luck