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How To Replace The Crankshaft Sensor

Believe it or not, your car will eventually need a new crankshaft sensor. This component is essential to the functionality of your engine, and if it goes bad, your car will not start. Not only can this be a major inconvenience, but it can also result in expensive repairs. In this blog post, we will teach you how to replace the crankshaft sensor on your own, so that you don’t have to take your car in for repair.

What is a Crankshaft Sensor?

A crankshaft sensor is a device that monitors the rotation of the crankshaft, which is the main component of the engine. When problems arise with the engine, such as a misfires or loss in power, the sensor can detect this and alert the driver. If the sensor isn’t functioning properly, it can cause poor performance or even a breakdown.

How Does a Crankshaft Sensor Work?

A crankshaft sensor is a device that monitors the rotational speed of the engine and sends this information to the ECU. If the rotational speed falls below a certain threshold, the ECU will activate one or more warning lights on the dashboard. This is why it’s important to keep an eye on your crankshaft sensor readings and address any issues as soon as possible. Here’s how a crankshaft sensor works: The sensor is mounted inside the crankcase near the oil pump. As the engine turns, metal from the rotating crank contacts the sensor which causes it to generate an electrical signal. The signal is then transmitted through wires to an input on the ECU. The ECU uses this information to determine if there are any problems with the engine and act accordingly.

Symptoms of a Crankshaft Sensor Failure

If you’re experiencing strange engine behavior or your car isn’t starting, there’s a good chance your crankshaft sensor is faulty. A crankshaft sensor is a small device that measures the angle of your crankshaft when it’s turning. If it’s not detecting the correct angle, the sensor can fail and cause all sorts of problems. Here are some symptoms to look for:

1. Problems with starting or running

If your car doesn’t start in cold weather or if it starts but stalls shortly after, there’s a good chance your crankshaft sensor is causing the problem. A faulty sensor can also cause misfiring and hesitation in engines that use fuel injection.

2. Engine noises and vibration

A noisy engine or one that vibrates significantly when you apply pressure to the gas pedal are signs your crankshaft sensor is likely failing. This can also lead to premature wear on other components in the engine, including the camshafts and pistons.

3. Poor fuel economy or loss of power

A weak or failing crankshaft sensor can limit how much power your engine can generate, which will result in reduced fuel economy or loss of power under heavier loads. In severe cases, this could even lead to an engine seizure or even be fatal.

How to Replace a Crankshaft Sensor

If your car’s engine is making a clicking or knocking noise, it may be time to replace the crankshaft sensor. This sensor is located on the crankshaft and detects when there is a problem with the oil flow. If the sensor isn’t working properly, the engine will not be able to turn as freely, which can result in problems such as poor fuel economy and loss of power. Here are instructions on how to replace the crankshaft sensor:

1. Park your car in a safe location.
2. Shut off the engine and remove the spark plugs.
3. Remove the flywheel/cover by loosening two bolts and pulling it off of the crankshaft pulley.
4. Remove the crankcase cover by removing four screws from around its perimeter (two near each side). Pry up on one side and pull it free to reveal the camshaft bearing caps. Hammer these caps off with a screwdriver until they release; you don’t need them anymore since you will be replacing the sensor later on.
5. Disconnect both fuel lines from both sides of the engine block using clips or pliers; be careful not to pinch them shut! Also remove any air bubbles that may have developed in either line while it was disconnected.
6. Place a jack under each end of the engine block, then use an adjustable wrench to loosen all eight bolts that secure it together (four at


If you’re experiencing any issues with your car, it’s probably a good idea to replace the crankshaft sensor. This is a relatively easy job that can be completed in just a few hours. Here are instructions on how to do it.