The P0118 code means that the engine control module (ECM) has detected a voltage signal that’s too high from the engine coolant temperature (ECT) sensor (below). In practical terms, the ECM believes ...

Something I've realized over the past few years poking with a large variety of cars: Nobody has low coolant or low oil sensors! I drove an '88 Mazda RX-7 with both, and they were quite valuable! The ...

You can also try shining a high-intensity flashlight through the side of the reservoir, or even down inside it. That can illuminate the coolant, and makes it easier to see its level. Or shake the car ...