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How to Repair Short Circuit Crankshaft Position Sensor

How to Repair Short Circuit Crankshaft Position Sensor

How to repair short circuit crankshaft position sensor? The crankshaft angle sensor is an integral part of a vehicle’s engine. Its purpose is to sense the rotation of the crankshaft as the engine runs and to communicate this information with the main PCM computer, which then controls fuel injection and ignition processes.

How to Repair Short Circuit Crankshaft Position Sensor

This type of sensor typically resides at the lower section of an engine block, near the position of its associated crankshaft. It may be located towards either end or in the middle.

What is a Crankshaft Position Sensor (CPS)?

This component plays an integral role in the proper functioning of engine systems by monitoring the rotational speed and position of the crankshaft. These readings are sent to the engine control unit, which then adjusts parameters accordingly if any malfunctions occur. If there is a problem with this sensor, it can cause several issues, such as an engine failure or poor performance because of inaccurate feedback from the component.

Therefore, it’s important to be aware of potential symptoms that may show a malfunctioning crankshaft position sensor. In order to pinpoint the cause of a potential problem with your crankshaft position sensor (CPS), try looking up any diagnostic trouble codes (DTCs) related to it. A CPS short circuit can result in a number of issues with how the engine operates. A multimeter can be used to check for electrical continuity and resistance along the wiring associated with the CPS.

How to Repair Short Circuit Crankshaft Position Sensor?

Take safety measures to avoid mishaps or electric shocks, make sure the car is off and the key is out of the ignition, then take the following steps to fix a short circuit in a crankshaft position sensor:

1. Remove Battery

It’s a good idea to disconnect the battery if you are working on the engine’s internals to prevent a short circuit in the vehicle’s electrical system. Additionally, unplug the main battery pack’s disarm plug from hybrid automobiles. For the location, consult your owner’s handbook.

2. Clear the Access to the Sensor

The crank sensor is tucked away behind the starter motor, so it must be removed for access. When doing this job underneath the car, it may help to have a shop light nearby to provide improved visibility of what you are working on.

3. Examine the Sensor Position

The crankshaft angle sensor may be difficult to identify due to the transmission cooling lines in front of it. However, there should be an electrical connector attached to its side on the engine block. If oil is present around this area right now, it would be beneficial to use a small amount of carburetor cleaner for removal and ensure a clean start when carrying out any work here.

4. Pull the Electrical Connector Apart

An electrical connector can be attached to the sensor by using a plastic clip. To remove it, one must depress or pull outward on the clip before wiggling it loose from the sensor. The weatherproof seal, which helps keep water out and thus prevents corrosion at the terminals of the sensor, may cause it to be stuck. After detaching the connection, inspect for rust and repair or replace any faulty pigtails that are found. If left unresolved, this issue could lead to engine stalling.

5. Detach the Sensor Mount Bolt

The crankshaft sensor will usually have a single mounting bolt that is generally 10mm in size. To take off the bolt, use either a small wrench or a socket and turn it counterclockwise until it loosens. Put the bolt somewhere secure so that you don’t misplace it.

6. Detach the Sensor

How to Repair Short Circuit Crankshaft Position Sensor

Removing the crank sensor can be challenging, as they have a long stem, which makes them difficult to remove from the engine block. One approach is to use a small pick or standard screwdriver to wedge under the sensor’s mounting tab and carefully pull it loose. Yet, be mindful not to apply too much tension, as these sensors are prone to breakage, leaving part of the component inside. If this occurs, you may push what remains inward such that it falls into the oil pan and stays there.

An alternative option would be taking out the oil pan in order so that any broken pieces can be more easily removed. If you are successful in loosening, firmly grip onto it, then give it a twisting motion and pull away from the engine block. The O-rings commonly present on these sensors will probably need replacement once taken off. Though manufacturers often include new ones with each purchase of their product.

7. Verify if the New Crankshaft Sensor’s Fit

Before installing a new sensor, it is important to clear away any oil residue that the old one may have left behind. This will allow for more visibility of minor design changes between them, such as mounting tabs or even a difference in stem length. It’s essential to pay attention to this detail so you can ensure that you choose the right size stem size. Because if it is too long it could contact the crankshaft and if too short, there won’t be an accurate reading.

8. Installation of the New Crank Position Sensor

Before fitting the new sensor, use a shop towel to clean the position sensor port hole. This will ensure that the newly installed O-ring makes an effective seal. Since motor oil is present in this area, do not use the carburetor cleaner directly inside the port. To help with cleaning, you can spray some of this cleaner on the shop towel before wiping down this part of your machine.

The mounting plate hole should line up with the threaded bolt hole in the block as you center and firmly insert the new crank sensor into the sensor port hole. Next, insert the mounting bolt and manually thread it in while rotating it in a clockwise direction to prevent cross-threading.

To prevent damage to the O ring seal, which would result in an oil leak, lubricate it with a tiny amount of clean engiengine oil or WD40. Following the installation of the sensor, thread the mounting bolt into position and tighten to a torque of 2 to 3 foot-pounds. When you hear a click signaling that the electrical connector has been successfully installed and is ready for use, push it into position.

9. Reattaching the Battery

Once you have finished the job, take the car off of the jack stands and reattach the negative battery cable. That’s all there is to it. Make sure to check out the video at the end for a visual guide.

10. Testing

Finally, check to see if the problem has been fixed by starting the car. You might need to change the crankshaft position sensor directly if the issue doesn’t go away.

How Much Does it Cost to Repair Short Circuit Crankshaft Position Sensor?

How to Repair Short Circuit Crankshaft Position Sensor

There are many factors that can influence the price of fixing short-circuit crankshaft position sensors. Factors such as the make and model of your car, the location of the repair facility, and the degree of the damage can all affect how much it will cost to fix a shorted crankshaft position sensor in Nigeria. However, the price to replace a crankshaft position sensor can often range from ₦5,000 to ₦15,000 or more, depending on the labor costs and the quality of the sensor.

The price can be higher if the short circuit has harmed further parts or wiring. If you need to know how much it will cost for an auto repair in Nigeria, we recommend reaching out to various local mechanics and garages. Provide each of them with information about your vehicle and the specific issue at hand, so they can give you an accurate estimate. Additionally, it’s wise to compare quotes from different service providers in order to make sure that you’re getting a good deal on the repair.


We hope with this detailed guide on “how to repair short circuit crankshaft position sensor” you can successfully make a quick and accurate fix on your vehicle. However, modifying an automobile’s electrical system can be challenging and even deadly if done improperly. Seek the advice of a skilled automobile technician if you are unsure about any step or don’t have the required equipment or skills. You can also take a look at how to fix Hyundai and check the engine light.

Frequently Asked Questions

1. Can a short-circuited CPS cause engine damage?

Yes, a short-circuited CPS can cause engine damage if it leads to incorrect timing or fuel injection. Ignoring CPS issues can result in more costly repairs down the line, so prompt diagnosis and replacement are essential.

2. Can I prevent CPS short circuits from happening?

While you can’t entirely prevent CPS short circuits, you can reduce the risk by ensuring proper installation and securing wiring harnesses away from moving engine parts. Regular vehicle maintenance and inspections can help catch potential issues early.

3. Can I repair a short-circuited CPS, or do I need to replace it?

In most cases, it’s best to replace a short-circuited CPS rather than attempting to repair it. Repairing may not guarantee a reliable fix, and a faulty CPS can lead to engine problems.

4. What are the common symptoms of a short-circuited CPS?

Common symptoms include rough idling, stalling, poor engine performance, and difficulty starting the vehicle. You may also notice illuminated warning lights on the dashboard, such as the Check Engine Light.

5. Can I prevent CPS short circuits from happening?

While you can’t entirely prevent CPS short circuits, you can reduce the risk by ensuring proper installation and securing wiring harnesses away from moving engine parts. Regular vehicle maintenance and inspections can help catch potential issues early.

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