So I just left my car off at the car wash for an interior detail(washing the seats etc). He calls me out of the blue and tells me the check engine light is on and the car won't drive anymore. He says the mechanic next door says its an expensive thing to fix too. The corolla is pretty new (4 years old) and I've never seen the check engine light on before. Wondering if the car wash guy broke something? What can I do?