I had my car to an auto shop and had my engine washed by a Mechanic two days ago. It is fine until this morning while I was driving the battery light is on. It's not happened before and I am sure it's not the battery because I had the battery changed a couple months ago. Do you know what's wrong with it? And also, after the engine washed the sound of the engine seems louder, is it normal? My car is the Toyota Camry 93. Any comments or hints would greatly appreciated. Thanks in advanced.
Kelly