How to Reset Crankshaft Position Sensor: Ultimate Guide.


To reset crankshaft position sensor for a no-start issue, disconnect the battery and wait for 30 seconds before reattaching it. A faulty crankshaft position sensor can prevent your car from starting.

If you’re experiencing a no-start condition, it’s important to troubleshoot the issue and determine whether the sensor is the culprit. If the sensor needs to be reset, you can try disconnecting the battery for about half a minute to clear the codes and reset the system.

However, if this doesn’t solve the problem, you may need a mechanic to diagnose and repair the sensor or other related components. In this article, we’ll look at some common signs of a bad crankshaft position sensor, the steps to reset it, and some tips for troubleshooting the issue.

How to Reset Crankshaft Position Sensor: Ultimate Guide.


Signs That Your Crankshaft Position Sensor Needs Resetting

It’s essential to be watchful of the warning signs indicating that your crankshaft position sensor may require resetting. Here are the following signs that indicate when it is the right time to reset your crankshaft position sensor:

Common Issues With The Sensor

Several common issues arise with the crankshaft position sensor, requiring a reset. Some of these problems are:

  • Corrosion or dirt buildup on the sensor.
  • Damaged or deteriorated wiring due to high temperatures or malfunctioning electrical systems.
  • The sensor getting loose or being improperly installed.

Warning Lights Or Error Codes In The Dashboard

One of the primary indications that your crankshaft position sensor needs resetting is a warning light popping up on the dashboard. It is usually located in the lower right corner of the instrument panel and resembles a vehicle with a hole.

Other codes include p0335, p0336, p0337, p0338, and p0339. Any of these codes suggest that you need to inspect, repair, or reset your crankshaft position sensor.

Engine Stalling Or Rough Idling

Another clear sign that your crankshaft position sensor is in need of resetting is when your engine stalls unexpectedly, even when you are not moving in traffic. Additionally, if your engine shakes, vibrates, or the rpms fluctuate while idling, the problem may be due to the malfunctioning of the sensor.

Difficulty Starting The Engine

The crankshaft position sensor plays an essential role in the engine starting process. When you turn the key, the sensor tells the car computer, which activates the fuel injector and starts the engine. If the sensor is not working correctly, you may experience difficulty starting the engine or have to work harder than usual to get the engine to start correctly.

Diagnosing The Need For Resetting

If you are experiencing any of the above issues, it is essential to perform a diagnostic test to determine if your crankshaft position sensor needs resetting. Use an obd-ii scanner or take your vehicle to a certified mechanic who will run diagnostic tests to identify if your sensor requires recalibrating.

Finally, resetting your crankshaft position sensor may help solve problems such as engine stalling, rough idling, warning lights, and difficulty starting the engine. However, the root cause of the problem may not be the sensor itself, but rather additional issues with your wiring or car computer.

Therefore, relying solely on resetting the sensor may not always be a long-term solution.

Steps To Reset A Crankshaft Position Sensor

Resetting a crankshaft position sensor may seem daunting, but with a bit of mechanical knowledge, it can be done with ease. Follow these simple steps to reset your crankshaft position sensor for optimal engine performance.

Precautions Before Resetting

Before resetting your crankshaft position sensor, it is imperative to take necessary precautions to ensure safety. Here are some key points to remember:

  • Always wear proper safety gear, including gloves and goggles.
  • Disable the ignition before working on the sensor.
  • Disconnect the battery to avoid electrocution and other electrical hazards.

Accessing The Sensor Location

Before resetting the sensor, you need to locate it. It’s typically located on the engine block’s front side, near the crankshaft. Follow these steps:

  • Consult your vehicle’s manual to find the sensor’s exact location.
  • Use a jack to lift the car’s front side and place support stands to avoid any hazards.
  • Use a socket wrench to remove any components blocking the sensor’s access.

Removing And Cleaning The Sensor

After accessing the sensor, you need to remove and clean it.

  • Use a socket wrench to remove the retaining bolts that hold the sensor in place.
  • Detach any wires connected to the sensor and remove it from its position.
  • Clean the sensor with a soft-bristled brush, such as an old toothbrush, to remove any debris and dirt.

Reinstalling The Sensor Correctly

Resetting the sensor requires proper reinstallation to ensure accurate readings. Here are the necessary steps:

  • Insert the sensor back into the engine block’s position.
  • Secure it with retaining bolts and ensure proper tightening.
  • Reconnect any wiring components that were removed.
  • Check and install any components that were removed previously to access the sensor location.

Testing The Engine After Resetting

After reinstalling the sensor, it’s crucial to test the engine to make sure everything is working correctly. Here are some steps to follow:

  • Reconnect the battery terminals and turn on the ignition.
  • Start the engine and verify if the engine is running smoothly.
  • Use an obd-ii scanner to check the sensor’s efficiency and the engine’s performance.
  • Test drive the vehicle to make sure it runs correctly.

Resetting a crankshaft position sensor requires some mechanical experience, but it’s manageable with these simple steps. Always take necessary precautions, follow these steps, and test the engine after resetting the sensor to ensure optimal engine performance.

Tips To Avoid Further Issues

Importance Of Regular Maintenance

Regular maintenance is crucial to keep your car running smoothly and to prevent any issues. Neglecting maintenance can lead to various problems and may even cause the crankshaft position sensor to malfunction. Follow the manufacturer’s recommended maintenance schedule to ensure that your vehicle is in top condition.

Here are some basic maintenance tips to follow:

  • Change the engine oil regularly
  • Replace air filters when necessary
  • Check the spark plugs periodically
  • Regularly inspect and replace worn-out belts and hoses
  • Check the coolant level and replace it if necessary

Significance Of Correct Installation

Ensure that you install the crankshaft position sensor correctly to avoid any issues. A poorly installed sensor can cause problems and lead to incorrect readings. Follow the manufacturer’s recommendations while installing the sensor. Here are a few things to keep in mind while installing the sensor:

  • Clean the sensor and its housing before installation
  • Make sure that the sensor is not damaged
  • Do not apply excessive force while installing the sensor as it may break
  • Use proper torque specifications while tightening the sensor

Watching Out For Symptoms Of Malfunctioning

It’s essential to know the symptoms of a malfunctioning crankshaft position sensor and address them promptly. Common signs of a faulty crankshaft position sensor include:

  • Difficulty starting the engine
  • Stalling or hesitation while driving
  • Rough idling or engine misfires
  • Increased fuel consumption
  • Illuminated check engine light

If you notice any of these symptoms, get your vehicle inspected by a professional mechanic.

Seeking The Assistance Of A Professional Mechanic

If you are unsure about the correct installation process or face any issues, it’s best to seek the assistance of a professional mechanic. A qualified mechanic can diagnose any issues accurately and provide appropriate solutions. Moreover, they can ensure that the sensor is installed properly and is functioning optimally.

Appropriate Replacement Of Damaged Components

If you notice any damages to your car components, it’s crucial to replace them immediately. Delaying the replacement can lead to significant issues and may even cause the crankshaft position sensor to malfunction. Always use high-quality replacement components to ensure optimal performance and longevity of your vehicle.

Following these tips can help you avoid any further issues while resetting the crankshaft position sensor. Regular maintenance, correct installation, watching out for symptoms, seeking professional assistance, and replacing damaged components can go a long way in keeping your car running smoothly.

Common Mistakes To Avoid When Resetting Crankshaft Position Sensor

Resetting a crankshaft position sensor can be a complex task, and it is important to avoid some common mistakes to ensure it is carried out correctly. In this section, we will discuss these pitfalls to help you perform the process without any hiccups.

Incorrect Sensor Identification

One of the most common mistakes that technicians make is incorrect sensor identification. They assume that all sensors are the same, but each vehicle has a specific crankshaft position sensor. Always refer to the manufacturer’s manual or consult a service mechanic.

When there is a wrong sensor installed or wrongly positioned, it will not function properly, leading to incorrect readings. Consequently, the crankshaft position sensor output could be erroneous, causing a range of issues.

Improper Installation

Improper installation of the crankshaft position sensor could be another issue when resetting. Always follow the manufacturer’s instructions and guidelines before proceeding with the installation. Failing to position the sensor correctly will result in incorrect readings and throw error codes, even after a reset.

Failure To Follow The Correct Process

Resetting a crankshaft position sensor requires following specific guidelines. There are a series of steps and procedures that must be followed to perform a successful reset. Failure to do so will result in the sensor not working, and the reset will be useless.

Rushing Through The Process

Rushing through the process of resetting a crankshaft position sensor is a common mistake that can result in several problems. This task requires patience and thoroughness to avoid causing damage and additional repairs. Skipping steps or hurrying the process can cost you time and money.

Misunderstanding Error Codes

When the crankshaft position sensor throws error codes, do not assume that a reset will automatically solve the problem. Understanding the error codes and diagnosing the problem before resetting the sensor is critical. Always find the root cause before proceeding with the reset.

Prevention is better than cure, and it is always better to avoid these common mistakes by following proper procedures and guidelines. Ultimately it will save time and money, while also providing long-lasting performance and reliability.

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

Can A Bad Crankshaft Position Sensor Prevent A Car From Starting?

Yes, a faulty crankshaft position sensor can prevent starting or cause the engine to stall while in use.

How Much Does It Cost To Replace A Crankshaft Position Sensor?

The cost to replace a crankshaft position sensor varies depending on the make and model of the car. On average, it costs around $200 to $300.

How Do You Test A Crankshaft Position Sensor?

A faulty crankshaft position sensor can be diagnosed by using a multimeter or scanner tool to check voltage and resistance readings.

How Long Does It Take To Replace A Crankshaft Position Sensor?

Replacing a crankshaft position sensor can take between 2 to 4 hours, depending on the make and model of the car and the location of the sensor.

What Are The Signs Of A Bad Crankshaft Position Sensor?

Signs of a faulty crankshaft position sensor include difficulty starting the engine, frequent stalling, poor acceleration, and engine misfires.


Finally, resetting the crankshaft position sensor could be a daunting task, and it requires precise, careful, and technical steps. It is crucial to ensure that you have all the required tools, and you understand the instructions well before beginning the process.

This way, you can save money on hiring a professional mechanic and still have your car running smoothly. It is essential to note that the crankshaft position sensor plays a significant role in the functioning of your car’s engine. Therefore, you need to ensure that it is in excellent condition and properly functioning.

This post has provided you with a step-by-step guide on how to reset the crankshaft position sensor-no start hassle-free. Follow these instructions and enjoy driving your car once again. Remember always to prioritize your safety first and take precautions while working on your car.

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