These are six common types of dashboard gauges. Let's understand their functions and how one can read them.
1. Speedometer
If someone has to rank the most important gauge in a car, it would be the speedometer. However, a speedometer’s function is highly dependent on car tyres. Therefore, even minor inaccuracies can affect your car’s speed. Previously a car’s speed was measured through a complicated system, but it got simplified with the electronic sensors.
How to Read a Speedometer?
Speedometers contain two semicircles with markings. The smaller or inner semicircle indicates your car's speed in kilometres per hour (km/h). However, the outer semicircle indicates your speed in miles per hour (mph).
2. Fuel Gauge
Another crucial dash instrument is the fuel gauge. Car manufacturers deliberately made it for inaccurate reading. After filling the tank, you will notice that this gauge stays on the full (F) sign for a long time and gradually drops. When this needle points at the empty sign (E), it still contains some fuel (1-2 gallons) in reserve.
How to Read a Fuel Gauge?
Reading a fuel gauge is the simplest. ‘F’ in this gauge denotes 'Full', and ‘E’ stands for 'Empty'. Unfortunately, when one is too focused on the road, they can miss where that needle is located in this gauge. To avoid such situations, car manufacturers have installed warning lights. If you notice it is blinking, immediately fill your car tank.
3. Temperature Gauge
From the name itself, you can figure out its function. This particular dashboard meter measures the engine coolant. When you start a car, the gauge will first display it is cold and then rise. If your car signals a rising temperature, it is better to pull over and let the engine cool down. Continuing to drive with an overheated engine can cause permanent damage to the car.
How to Read a Temperature Gauge?
In older car models, this was simply denoted with hot or cold signs. It is now changed to a thermometer symbol, but not all cars come with a temperature gauge. Instead, they now have a temperature warning light that glows when the engine overheats. You must let your engine cool down in situations like this by making a pit stop.
4. Tachometer
Unlike other dashboard gauges, a tachometer is the least used. However, tachometer readings are essential in cars that need a manual transmission. This helps the driver know the right time to change gears. Monitoring a tachometer also helps maintain fuel efficiency along with the best acceleration. Another purpose of a tachometer is to warn if the engine is pushed roughly.
How to Read a Tachometer?
The function of this gauge is to measure how fast the engine turns RPM or revolutions per minute. So, on the dashboard, you will find single-digits displayed along with “x 1000”. Thus, indicating you need to multiply the number displayed by 1000. With a higher RPM reading, more fuel is consumed. So, the best reading is when the RPM is lower and consistent to help the engine operate at an optimal level.
5. Voltmeter
Voltmeter provides information on the battery health of a car. Unlike the other digital dashes, not all passenger cars have this gauge but contain a low-battery warning light. If the voltmeter lights up in any condition, it indicates something is wrong with your vehicle’s electrical system.
How to Read a Voltmeter?
Most vehicles nowadays contain a 12-volt electrical system. Therefore, when a car battery is fully charged and functional, it must read 12.5 volts when the engine is not running. On the other hand, if the engine is running, its alternator will recharge the battery. Therefore, if you notice a drop in the voltmeter, the car will not start.
6. Oil Pressure Gauge
As the name states, the oil pressure gauge measures fuel consumption. Oil is responsible for running all its other parts. It is never a wise decision to drive a car with a lower fuel level as it can damage your car’s engine. Lower oil pressure can occur in instances if there is any serious leakage. Another possibility is that the fuel is full of dirt, making it difficult to flow.
How to Read an Oil Pressure Gauge?
Previous automobile models used to have a dial displaying oil pressure. However, newer models now have a warning light on the dashboard that marks the oil pressure levels. You can measure this in pounds per square inch or psi. Whether in an older car or new, if you find the low oil pressure signal is on, you must opt for car servicing.
