How to Reset Crankshaft Position Sensor and Start Your Engine

To reset crankshaft position sensor for a no start issue, disconnect the battery for 10 minutes and then reconnect it. When the engine fails to start, it could be a result of a failed crankshaft position sensor.

In such cases, it becomes essential to reset the sensor. The crankshaft position sensor helps to monitor the rotational speed and position of the crankshaft. It transmits the data to the engine control module. When this sensor fails, the engine may not start or may even stall while in use.

In such cases, resetting the sensor becomes a viable solution. Fortunately, resetting the crankshaft position sensor is pretty straightforward. It involves simply disconnecting the battery for about ten minutes and then reconnecting it. This process resets the vehicle’s computer system and the sensor, allowing you to start the engine without any issues. If the problem persists, it is advisable to consult a mechanic to diagnose the issue further.

How to Reset Crankshaft Position Sensor and Start Your Engine


Signs Of A Faulty Crankshaft Position Sensor

Explanation Of What A Faulty Cps Is And Its Symptoms

Your car’s engine may have a crankshaft position sensor (cps) that informs the engine control module (ecm) of the crankshaft’s rotational speed. This information is critical because the ecm controls the ignition and fuel delivery systems based on the position and speed of the crankshaft.

When the cps fails, the ecm becomes unaware of the crankshaft’s position and speed, causing subsequent engine issues.

Here are some signs of a faulty cps that may help you avoid further engine problems:

  • Check engine light (cel) illumination
  • Engine misfire or hesitation
  • Stalling or difficulty starting the engine
  • Power loss while driving
  • Poor fuel economy
  • Odd engine noises or vibrations

How To Diagnose A Faulty Cps Using An Obd Scanner

An on-board diagnostics (obd) scanner helps diagnose various problems in a car. When it comes to diagnosing a faulty cps, an obd scanner can retrieve obd trouble codes that will help determine the cps’s condition accurately. Here’s how to diagnose a faulty cps using an obd scanner:

  • Connect the obd scanner to the vehicle’s obd ii connector.
  • Turn the key to the ‘on’ position or start the engine.
  • Select ‘read codes,’ and the scanner will display a list of dtc codes.
  • If the scanner displays p0335 (cps ‘a’ circuit malfunction) or p0336 (cps ‘a’ circuit range/performance), it means that the cps is faulty.
  • Erase the codes once you’re finished.

If the problems persist, don’t hesitate to take your vehicle to a professional mechanic for further assessment.

Remember, identifying a faulty cps based solely on symptoms is not a foolproof method, and diagnosing the issue depends mainly on tested results from the scanner. Therefore, using an obd scanner will aid in determining the cps’s condition more accurately, saving you time and money on purchasing parts that have nothing to do with the problem.

Steps To Reset Crankshaft Position Sensor

The crankshaft position sensor, or cps, is a critical component in ensuring that your engine runs smoothly. However, if it develops faults, your engine won’t start. In such cases, resetting the cps might solve the problem. Here’s a step-by-step guide:

How To Disconnect The Battery Before Starting The Process

Before touching any components of your engine, disconnect the battery, and wait for at least 20 minutes. This prevents electrical shock and any other malfunctions that could arise.

Details On How To Locate The Sensor In Different Types Of Engines

Different engine models have different locations for the cps. It’s important to locate the sensor before proceeding. Here are some typical cps locations:

  • In most engines, the cps is found near the engine’s crankshaft pulley.
  • In some engines, it might be located on the engine block.
  • You can also find it on the engine’s flywheel or transmission.

Tips For Removing And Installing The Sensor Properly

While removing and reinstalling the cps, some things to keep in mind are:

  • Before installing the sensor, ensure that the sensor’s mating surface is free of debris and fluids to aid in proper installation.
  • When removing the sensor, avoid twisting it, since it could break the sensor off. Instead, wiggle it out of place slowly.
  • If you are installing a new sensor, always tighten the bolt to the torque value given in the manufacturer’s specifications.
  • Also, don’t forget to reconnect the wiring connector plug to the cps.

Following these tips and steps will help you reset the cps and start your engine. Always be cautious and take safety precautions since you are dealing with electrical systems. Happy driving!

Common Issues Encountered And Their Solutions

Explanation Of Common Issues Faced While Resetting The Cps

If your engine is not starting properly, chances are you need to reset your crankshaft position sensor (cps). However, resetting the cps may come with its own set of challenges. Below are some common issues faced while resetting the cps:

  • Cps losing synchronization with the engine: If the cps loses synchronization, it may register an incorrect position of the crankshaft. This can lead to starting issues or even misfiring.
  • Dirty or damaged sensor: A dirty or damaged sensor can lead to incorrect readings and fail to reset the cps properly.
  • Wiring issues: Wiring issues can cause the sensor to fail to register the correct position of the crankshaft.

How To Troubleshoot Common Problems And Their Solutions

While resetting the cps, some common problems can occur. Here are some troubleshooting tips and their solutions:

  • If the cps is losing synchronization, you can try repositioning it to ensure it is correctly aligned.
  • If the sensor is dirty, carefully clean it using a sensor-safe cleaner. A damaged sensor, however, may require replacement.
  • In case of wiring issues, start by checking the wiring connections and replace any damaged wires or connectors.

Explanation Of Why It’S Important To Test The Cps After Resetting

Once you are done resetting your cps, it’s important to test it to ensure the issue has been resolved and your engine is running smoothly. Here’s why:

  • Verifies proper functioning: Testing the cps ensures that it has been reset properly and that your engine is back to its optimal performance.
  • Prevents future damage: By testing the cps, you can identify any underlying issues that may have caused the problem and prevent future damage to your engine.
  • Saves time and money: Testing the cps can prevent further damage to your engine, saving you time and money on repairs.

Resetting your cps can be challenging, however, by troubleshooting common problems, you can solve most issues. Testing the cps after resetting is crucial to ensure that your engine is running smoothly, prevent future damage, and save you time and money on repairs.

Frequently Asked Questions For How To Reset Crankshaft Position Sensor No Start

What Is A Crankshaft Position Sensor?

A crankshaft position sensor is an electronic device that monitors the position of the crankshaft. It’s a crucial component in the engine management system.

What Are The Signs Of A Bad Crankshaft Position Sensor?

The signs of a bad crankshaft position sensor include engine misfires, stalling, and trouble starting. The check engine light may also come on.

Can You Reset A Crankshaft Position Sensor?

Yes, you can reset a crankshaft position sensor by disconnecting the battery, waiting a few minutes, and reconnecting it. This can clear any stored error codes.

How Do You Replace A Crankshaft Position Sensor?

To replace a crankshaft position sensor, locate it on the engine and disconnect the electrical connector. Then, remove the mounting bolt and pull the sensor out.

Can A Bad Crankshaft Position Sensor Cause A No-Start?

Yes, a bad crankshaft position sensor can cause a no-start condition. If the sensor fails, it can prevent the ignition system from functioning properly.


If you are struggling with a no-start condition in your vehicle, the crankshaft position sensor may be the culprit. It is essential to understand the symptoms and warning signs of a faulty sensor so that you can take appropriate action.

By following the steps outlined in this article, resetting your crankshaft position sensor is a straightforward process that can save you valuable time and money. Remember to handle all components with care, utilize the proper tools, and consult with a professional if necessary.

With patience and diligence, you can reset your crankshaft position sensor and get your vehicle back on the road in no time. Don’t let a no-start condition hold you back – take control and fix the problem today!

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