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How To Change A Crankshaft Sensor

When your car starts to misbehave, there’s one part of the engine that’s most likely to be to blame: the crankshaft sensor. This component is responsible for monitoring the condition of the crankshaft, and if it detects any issues, it will signal the engine controller to engage diagnostic mode. In this blog post, we will explore what Causes a Crankshaft Sensor to Fail and how you can fix it. From oil leaks to worn gears, we’ll cover everything you need to know in order to get your car back on the road.

What is a Crankshaft Sensor?

A crank shaft sensor is a sensor that is located on the crankshaft. It sends information to the engine control module (ECM) about the position of the crankshaft. If there is a problem with this sensor, it will cause the ECM to not allow the engine to start. A crank shaft sensor replacement is usually required when there is a problem with it, such as when it fails or when it needs to be replaced due to wear and tear.

How to Change a Crankshaft Sensor

If your car’s engine is misfiring, or if it just doesn’t feel as powerful as it used to, the crankshaft sensor might be the culprit. This small device monitors the engine’s revolutions per minute (RPM) and sends a signal to the ignition system to start the engine. Sometimes this sensor can go bad, causing poor performance or unintended engine shutdowns. If you think your crankshaft sensor is at fault, here are some steps on how to change it:

1 Remove the fuel cap and unscrew the gas tank.

2 Detach the negative battery cable.

3Remove the radiator grille.

4 Disconnect both spark plug wires from the coilpacks.

5 Place a JACK under each side of the car, and use a support structure to lift up one end of the car so that you can gain access to the differential. Use a screwdriver or socket wrench to remove bolts securing differential cover. Carefully pry off cover revealing motor mounts and crankshaft sensor. Be sure not to lose screws and washers!

6 Inspect motor mounts for damage; if there is any, replace them before re- installing cover. Note: When replacing motor mounts always use M6 bolts and washers rather than M3 screws in order for torque specs for differentials to be met properly when tightening nuts later on!

7 Restart car and check

What to do if a Crankshaft Sensor fails

If you’ve had your car in the shop for a while and the mechanic finally mentions that your crankshaft sensor might be failing, it’s time to take action. A crankshaft sensor is an important part of your engine, and without it your engine won’t start. Here are some things you can do to check if your crankshaft sensor is indeed failing:

1) Turn off the car and remove the battery.
2) Disconnect the wiring from the sensor. This will allow you to inspect it more closely.
3) Check for metal shavings or particles coming from around or inside of the sensor. If you find any, then your sensor is most likely failing and should be replaced.


If your car isn’t starting well or you are having trouble with it running smoothly, it’s probably time to change the crankshaft sensor. This is a relatively easy job for someone who has some mechanical experience, but can be done by anyone with a bit of common sense and a phillips head screwdriver. If you’re uncomfortable working on cars, find a trusted mechanic to do the work for you.