The most common reason for a coolant temperature gauge not working is a problem with the coolant temperature sensor. Signs of a bad sensor include black smoke in the exhaust, a car using more gas than usual or a car overheating frequently. The check engine light also comes on when there is a problem with the coolant temperature sensor.Know More
The location of the coolant temperature sensor depends on the make and model of the car. However, most sensors are located in or near the thermostat of the cooling system, so it's wise to check the manual of the car to see if there are one or two sensors.
The coolant temperature sensor measures the resistance to the coolant and sends this information to the engine's control unit. The measurements are then relayed to the coolant temperature gauge. It is normal for a gauge to show a very low temperature when a car is first started, but after approximately 20 minutes, the needle of the gauge should rest at the midpoint.
Before replacing the coolant temperature sensor, check to make sure that none of the wires leading to and from the sensor are frayed or cut. Also, look behind the gauge to make sure it is properly wired.Learn more about Car Parts & Maintenance
An oil pressure gauge can fluctuate for many reasons, including an actual automotive problem as well as reasons like fluctuation in oil temperatures. In most cases, the gauge will fluctuate to indicate low oil pressure. When the gauge fluctuates to indicate high oil pressure, it is often indicative of a pressure relief valve problem.Full Answer >
Heat that is coming from inside the car as well as outside of the car can cause the temperature gauge of the car to increase. When temperatures are extremely high within the inside of the car, the temperature gauge will greatly increase and the car could suffer from many different problems.Full Answer >
Some symptoms of a clogged radiator are overheating of the engine, a temperature gauge that register a high reading on hot days and when an air conditioner is on, and higher than usual coolant consumption. The causes of a clogged radiator are debris, corrosion and an internal buildup of deposit that lead to a decreased amount of coolant flowing through the radiator.Full Answer >
Most cars have a throttle position sensor, manifold pressure sensor, engine coolant temperature sensor, mass air flow sensor, camshaft and crankshaft position sensors and a oxygen sensor. Automobiles also have detonation sensors, EGR sensors and intake air temperature sensors.Full Answer >