What does it mean when coolant sensor does not change?
What does it mean when coolant sensor does not change? This will indicate that your coolant sensor is responding to engine temperature. Also, make sure the engine reached operating temperature at about 200F (93C) before dropping. If engine temperature didn't change much throughout your readings, the thermostat is stuck open and you need to replace it. What are the symptoms of a bad cooling fan relay? 1. Engine running hot One of the first symptoms commonly associated with a bad or failing cooling fan relay is an engine that runs hot or overheats. If you notice that your engine is...