How to Adjust Crankshaft Position Sensors

What You'll Need
Replacement Crankshaft Position Sensor
Rubber O Ring
Paper Spacer
Screwdriver/Socket Wrench


There will be times when you may need adjust your crankshaft position sensors. This sensor is what is used to alert the electronic control unit to the rate of the actual spinning. The data is then used to determine how the engine is fired off. If you are experiencing misfires from the engine, this could be the culprit. Adjusting the crankshaft position sensor is simple to do as long as you have some patience and some basic tools. 

Step 1 – Disconnect Battery

The first thing that you will need to do is get your battery ground disconnected. This will be the negative cable that you will need to deal with. If you fail to do this you will be putting yourself at risk for getting injured or you could do serious damage to your vehicle. Accidental shorts as well as the electronic control module could end up becoming damaged if you do not take the time to disconnect your battery ground before beginning any work on your vehicle.

Step 2 – Locate Sensor

Once the battery has been disconnected, you are ready to try to find the crankshaft position sensor. This will usually be on the front part of your engine. It may also be in the rear or on the side. It is a good idea for you to get your hands on a shop manual so that you will be able to know where the sensor is. It will depend upon the make, year and the model of vehicle that you happen to have.

Step 3 - Wire Disconnection

You now need to get the wires disconnected that happen to lead to the sensor of your crankshaft. One of the wires that will need to be disconnected will be the current feed. The other ones that you disconnect will be the sensor output and the ground wire. Make sure that you know which is which as you disconnect them. They will end up going in the same places whenever you put in the new sensor.

Step 4- Crankshaft Position Sensor Removal

It is now time for you to remove your crankshaft position sensor. If it happens to be mounted on the front of your engine, then there will be a bracket hole that it will be fitted with. Expect it to be secured with a bolt that you will need to remove.

Step 5 – Finish Up

You are now ready to get your replacement sensor installed. You will also need to get the 3 wires reconnected. It is common that these sensors will simply lock into position without any adjustment. However, if your sensor happens to be on the side of your engine, then you are going to need to get a new O ring installed. Use a paper spacer at the end of the sensor if the crankshaft position sensor needs adjustment.