A crankshaft sensor checks the rotational speed of your crankshaft and transfer same information into the car’s on-board computer. The on-board computer then adjusts fuel delivery and spark timing according to the information from the crankshaft sensor. This is why it is an important part of the engine system; a bad crankshaft sensor touches not only the engine speed but also the fuel efficiency of your car. Apart from controlling the fuel injection process and ignition timing, crankshaft sensors are also in charge of the car’s emission performance, power output, reliability, and drivability.
A crankshaft sensor is made up of two parts—the rotating part and the static part. The rotating part is a toothed disc or wheel that turns with the engine cam. The static part is the crankshaft sensor itself. There is also a crankshaft sensor equipped with LED lights and gets its reading as the LED light pass through the slots of a disc that is linked to a wheel.
Knowing the signs of bad crankshaft sensor is important since a bad crankshaft sensor is the first signal of engine failure.
A crankshaft sensor is in charge of monitoring the rotation of the crankshaft. If the sensor is bad it will send the wrong sign into the car’s on-board computer, resulting in the inability of the engine operating system to sync the engine pistons together. This results in poor acceleration and makes your car fail to maintain constant speed.
Since the information given by the crankshaft sensor into the car’s on-board computer is used to determine the proper spark timing, a bad crankshaft sensor will send wrong readings into the computer, affecting the fuel injection process and causing the car engine to sputter.
Increased Fuel Consumption
Incorrect crankshaft sensor readings leading to spark timing and fuel injection errors does not only cause engine sputter but will also affect the fuel efficiency of your car. Have your car checked for crankshaft sensor problems if it takes you four gallons of gasoline to get from your home to the office instead of the usual two.
If your engine stalls at low speeds and your car has difficulty in starting the engine then your car is most likely having crankshaft sensor problems. This is because the crankshaft sensor is responsible for ignition timing.
Benefits of Having a Crankshaft Sensor
The benefits of having a crankshaft sensor in your car is that the car can make do without a distributor, which means less moving engine parts that breaking down.
It is imperative to have your car checked by a professional mechanic when you notice symptoms like engine sputtering, decreased fuel efficiency, engine stall, acceleration problems. With a bad crankshaft sensor, the engine cannot function at optimum and will eventually fail completely. A failing engine is not just costly to repair but dangerous, so it is in your best interest of safety to recognize these symptoms quickly to get the problem solved.
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