Crankshaft Position Sensor: The Unsung Hero of Your Car

A car is a complex machine, but few components are as important to its operation as the crankshaft position sensor. This integral component of your vehicle’s engine ensures that it runs smoothly and efficiently, allowing you to enjoy worry-free driving.

But what exactly does this oft-overlooked piece of hardware do? In short, it tells the ignition system when to send an electric spark for efficient combustion. Without it, your car simply wouldn’t be able to run at all. The crankshaft position sensor is the unsung hero of any car – reliable yet often overlooked until something goes wrong!

Understanding the Role of the Crankshaft Position Sensor in Your Vehicle


The crankshaft position sensor is an essential part of many cars, yet it often goes unrecognized. Understanding its role in a vehicle can help drivers better understand the inner workings of their car and how to properly maintain it.

At its most basic, the crankshaft position sensor helps your car’s engine control module (ECM) figure out when to fire each spark plug as well as provide input on fuel delivery.

It does this by detecting changes in rotational speed and translating them into electrical signals that indicate where the pistons are about one another at any given moment. Without this crucial piece of information, an engine would not be able to run efficiently or safely.

In addition to these key functions, some modern cars also use the output from their crankshaft position sensors for other purposes such as monitoring wheel slip during cornering or measuring exhaust gas recirculation rates for optimum fuel economy. This makes them even more vital components of a car’s overall operation than was previously thought.

As such, ensuring that they are regularly serviced is important for both performance and safety reasons; failure of a crankshaft position sensor can cause issues ranging from stalling and misfiring right through up to catastrophic mechanical damage if left unchecked!

How to Diagnose and Replace a Failing Crankshaft Position Sensor


To diagnose and replace a failing crankshaft position sensor, it is important to first identify the symptoms of the problem. These can include decreased fuel efficiency, rough idle, misfiring, stalling or hard starting engines, poor acceleration/power loss, and an illuminated check engine light.

Once these issues have been identified, an OBD-II scanner should be used to access data from sensors connected to your car’s onboard computer system to look for specific error codes related to camshaft timing errors such as P0335 or P0340 depending on make/model. If this confirms that there is something wrong with the CPS unit itself rather than another issue causing similar symptoms like spark plugs firing intermittently etc., then it is time for a replacement.

Replacing a worn-out CPS requires basic know-how and tools such as screwdrivers and pliers; however no special skills are necessary – just follow the steps listed above: locate where exactly under the hood yours sit (it should be somewhere near where all power cables meet), disconnect its electrical connections carefully using pliers by twisting them counterclockwise until they come off smoothly without force applied, unscrew bolts holding it in place with a suitable screwdriver until loose enough for removal from mountings, finally remove old part completely by pulling gently while keeping fingers away from moving parts did installing new part back in reverse sequence after making sure connections are firmly attached.

Once everything has been completed correctly start-up the engine – if successful CEL will now go off indicating successful replacement!

Common Causes of Crankshaft Position Sensor Failure


The crankshaft position sensor is an essential part of your car, yet it often goes unnoticed until something goes wrong. Unfortunately, these sensors can fail due to a variety of issues.

Common causes for crankshaft position sensor failure include physical damage from vibrations and contact with other parts in the engine bay, faulty wiring or connectors that prevent the signal from being sent or received correctly, and issues related to corrosion or contamination.

Poor maintenance practices such as failing to replace worn spark plugs can also contribute to crankshaft position sensor failure over time.

Other typical causes of failure include high temperatures caused by exhaust leaks or excessively lean fuel mixtures which can cause increased wear on the internal components such as bearings and coils, leading to eventual breakdowns in functionality.

The most effective way to avoid these problems is regular preventive maintenance checks where any potential issue can be addressed before it becomes too serious and costly.

Tips for Maintaining Your Car’s Crankshaft Position Sensor

  • Regularly Inspect Your Car’s Crankshaft Position Sensor: It’s important to routinely inspect the crankshaft position sensor in your car for any signs of wear and tear. Check for oil, dirt, or debris on the outside of the sensor that could cause damage over time. If you find anything, make sure to clean it off before continuing with the inspection.
  • Replace Worn Out Parts: If your crankshaft position sensor is showing signs of wear and tear, replace it as soon as possible so you don’t risk damaging other parts of your vehicle engine system. Make sure to get a high-quality replacement part that fits perfectly into place and won’t cause problems down the line.
  • Keep an Eye on Electrical Connections: It’s also important to pay attention to any electrical connections associated with your crankshaft position sensors, such as wires or plugs that may have become disconnected or worn out over time due to vibration from driving or weather conditions like humidity or extreme temperatures. Make sure all these connections are firmly secured and functioning properly at all times for optimal performance from your car’s engine system overall.
  • Invest in Professional Maintenance Services: Lastly, if you’re not comfortable inspecting and replacing parts yourself when needed, invest in professional maintenance services for your car instead so experienced technicians can check everything thoroughly and provide necessary repairs where needed without risking further damage down the line due to inexperience working on cars.



In conclusion, the Crankshaft Position Sensor is an essential yet often overlooked component of your vehicle. Without it, your car would not be able to run properly or efficiently. With Crankshaft Position Sensor by Suncent Auto, you can trust that this unsung hero will continue to do its job every time you get behind the wheel.