I have a 98 Camry and the fans stopped working. I am assuming the ECT switch is bad. At the same time, the engine sometimes dies on me or idles roughly. I am getting a P0115 error code which says the ECT sensor is bad. Do I need to replace both? It says a bad ECT sensor with cause the engine to sometimes die, but does the ECT sensor control when the fans come on?? Then what is the ECT switch for?? I guess I can just replace both.