Autozone pulled the Code P0118 suggesting the engine coolant temperature sensor may is higher than expected for the current engine operating conditions. One suggestion is to replace the sensor. However, when the parts person looked it up, it said no such device is required in the car. So, is that a error in the code reader or is there really a temp sensor it is refering to. I noticed some threads about black versus green sensor which makes me think I can address the problem. Where would this sensor be located? Also, how serious is this. Can I live with the problem until I figure it out and get a replacement part, or do I need to stop driving the vehicle?<br>Thanks for your ideas and comment in advance.