What to do after replacing the crankshaft sensor?

Replacing a crankshaft sensor can be a daunting task. But once you have done it, you may wonder what comes next. You must still do many things to get your vehicle back on the road.  So, what to do after replacing the crankshaft sensor?

After replacing the crankshaft sensor, it’s essential to perform a reset. Check the wiring for damage and ensure it is inserted correctly. Verify no fuses are blown; when checking, also be cautious of low-cost sensors that may be faulty.

Stay here; I will explore some essential steps you should take after replacing the crankshaft sensor to get your vehicle back in tip-top condition. Let’s get started.

Signs of a faulty Crankshaft that needs replacement

Signs for a faulty Crankshaft that needs replacement:

A crankshaft position sensor is responsible for monitoring the rotational speed and position of the crankshaft.

It is also responsible for transmitting this information to the engine control unit to make appropriate adjustments (depending on the vehicle’s operating conditions).

Here are the signs that indicate a faulty crankshaft position sensor that is faulty or needs replacement:

Problems starting the vehicle

It is the most common sign of a failing or bad crankshaft position sensor. If the crankshaft position sensor malfunctions, it could cause intermittent or even complete failure of the engine to start.

Engine stalling

If there is a lack of fuel pressure or decreased airflow, it can cause unexpected stalling. If the crankshaft position sensor’s data does not reach its engine computer or is inaccurate, it can cause the vehicle to stall suddenly.

Illuminated check engine light

If the engine light is on, it could indicate a problem with the crankshaft position sensor.

Rough idling

The engine may experience an uneven or irregular idle if the crankshaft position sensor is faulty.

Engine misfires

If the engine misfires, it could be due to a faulty crankshaft position sensor. It may cause the engine to produce uneven power and vibration.

Decreased fuel efficiency

A malfunctioning crankshaft position sensor can cause the engine to consume more fuel than necessary. Ultimately, it reduces the vehicle’s fuel efficiency.

Sudden loss of power

You may experience an engine suddenly losing power or feeling unresponsive, especially when accelerating.

Vibrations from the engine

A failing crankshaft position sensor can cause the engine to produce excessive vibrations. It is not only in the engine compartment; you may feel it throughout the vehicle.

How to replace the Crankshaft Sensor? (Step-by-Step Guide)

How to replace the Crankshaft Sensor?[ Step by Step Guide]

Replacing the crankshaft sensor is a complex task. But if you follow the steps below, it may not be very challenging.

Step 1: Disconnect the Battery

Before starting the replacement process, disconnect the battery’s negative terminal and keep it somewhere safe.

Step 2: Locate the Crankshaft Sensor

Next, locate the crankshaft sensor in your vehicle’s engine compartment. It is usually located at the bottom of the engine. Note that the camshaft sensor is located at the top of the engine and can often give fault symptoms similar to the crankshaft sensor.

Step 3: Remove the Retaining Bolt

Then remove the retaining bolt of the crankshaft sensor using a short extension. On some vehicles, you may need to remove the starter motor cable for better access to the sensor.

Step 4: Remove the Sensor from the Engine

Once the retaining bolt is loose, remove the sensor from the engine by pulling it out of its housing.

Step 5: Disconnect the Electrical Connector

Locate the electrical connector and disconnect it from the sensor. Some sensors have the connector on the sensor itself, while others have a short lead, and the connector is on the end.

Step 6: Soak the New Sensor and O-Ring

Before fitting the new sensor, clean it with engine oil and soak the o-ring too. When it comes to buying a new crankshaft position sensor, you have many choices. I recommend the ACDelco Professional 213-454 Engine Crankshaft Position Sensor. It is easier to fit and provides a good seal on the o-ring.

Step 7: Fit the New Sensor

Fit the new sensor into position and tighten the retaining bolt. Make sure not to over-tighten the bolt.

Step 8: Reconnect the Battery

Once the new sensor is in place, reconnect the battery’s negative terminal.

Step 9: Test the Vehicle

Finally, test the vehicle to ensure the new sensor works correctly. If the vehicle starts and runs without problems, you have successfully replaced the crankshaft sensor.

What Should I do after replacing the Crankshaft Sensor?

What Should I do after replacing the Crankshaft Sensor?

You have replaced the crankshaft sensor but still experiencing issues with your vehicle? You have to follow these steps to get rid of the problem:

Reset and Relearn Procedure

  • Check if your vehicle has a reset or relearn procedure for these sensors.
  • Every vehicle is different; some may not require this step, while others will need it to run correctly.
  • Advanced OBD2 scan tools often have a feature for relearning, but most people won’t have access to these.
  • Check for a manual procedure specific to your vehicle or Google your particular vehicle to find out if there is one.

Check to wire

  • The wiring can get damaged when the sensor is installed.
  • Examine the wiring and make sure everything is inserted correctly.
  • Ensure that none of the wires got pulled out when the sensor was installed.
  • If the wires are not connected correctly, it can cause a problem.

Check for Blown Fuse

  • Sometimes a fuse will blow when you swap these sensors out.
  • Check the fuse box and be sure that no fuse got blown.
  • Check the user manual/Google which fuses it for your particular vehicle.

Faulty Aftermarket Sensor

  • Sometimes, low-cost sensors do not work correctly and cause issues.
  • Be sure to check if you have a defective aftermarket sensor that needs to be replaced.

Can the crankshaft position sensor cause the car not to start?

Yes, a faulty crankshaft position sensor can prevent a car from starting. The sensor sends signals to the engine control module, which determines the fuel injection and ignition timing. Without accurate signals from the sensor, the engine may not start or run poorly.

How to reset crankshaft position sensor no start [ Scanner/ Without Scanner]

If you have replaced the crankshaft sensor, but it cannot. You can resolve the issue by resetting the crankshaft sensor. You have two methods to reset the crankshaft sensor.

Method 1- Resetting the crankshaft Sensor with Scanner

Step 1: Connect the Scanner

First, connect the scanner to the OBD-II port of the car. Make sure the scanner is properly connected and powered on.

Step 2: Select Vehicle System

On the scanner menu, select the vehicle system. Wait for the scanner to load the information.

Step 3: Go to Diagnosis Control Unit

From the vehicle system selection, go to the Diagnosis Control Unit option.

Step 4: Look for Crank Pattern Adjustment

Look for the Crank Pattern Adjustment option in the ECM. It is the only adjustment available for most of the vehicles.

Step 5: Clear Data from Memory

After replacing the CKP sensor, clear the stored data in the memory. You can do it through the scanner.

Step 6: Start Crankshaft Position Sensor Reset Procedure

Start the crankshaft position sensor and reset the procedure through the scanner.

Step 7: Check the Temperature

Make sure the car meets the criteria for the reset procedure. The vehicle must be at 167 degrees Fahrenheit. Rev up the engine to keep it at 2000-3000 rpm until the temperature is reached.

Step 8: Follow Scanner Prompt

Follow the prompts on the scanner to complete the reset procedure. Depress the accelerator down until fuel is cut, and release the pedal. Then turn the ignition switch off, and then turn it back on.

Step 9: Test Drive

After completing the resetting procedure, take a test drive of the car to ensure the issue has been resolved.

Method 2- Resetting the crankshaft Sensor without Scanner

Method 2- Resetting the crankshaft Sensor without Scanner

Step 1: Disconnect the Battery

Start with disconnecting the battery. It will keep you safe from electric shock and ensure safety.

Step 2: Locate the Sensor

Locate the crankshaft position sensor in your vehicle. The sensor is typically located on the engine block or the transmission housing.

Step 3: Remove the Sensor

Remove the crankshaft position sensor carefully by following the manufacturer’s instructions. You may need a wrench or socket to remove the bolts holding the sensor in place.

Step 4: Clean the Sensor

Clean the sensor with a soft brush and a safe cleaning solution for electrical components.

Step 5: Reinstall the Sensor

Reinstall the sensor by following the manufacturer’s instructions. Make sure that the sensor is properly aligned and tightened.

Step 6: Reconnect the Battery

Reconnect the battery and start the vehicle. The sensor should reset automatically and start functioning normally.

Does a battery disconnect reset the crankshaft position?

Disconnecting a battery can reset the crankshaft position sensor’s learned values and cause the engine’s computer to relearn the sensor’s position. However, it is not a guaranteed fix for any engine problem related to the crankshaft position. Other issues could still exist. It is always good to consult a professional mechanic for accurate diagnosis and repair.

How to start your car with a faulty crankshaft position sensor?

How to start your car with a faulty crankshaft position sensor?

Starting your car with a faulty crankshaft position sensor is not recommended, as it can lead to serious engine problems. However, if you need to start your vehicle in an emergency, here are some steps you can follow:

Step 1: Verify the issue

Before starting your car, ensure the crankshaft position sensor is faulty. Check for other signs of engine trouble, such as a rough idle or stalling, to confirm that the sensor is faulty.

Step 2: Bypass the sensor

To bypass the faulty sensor, you can try disconnecting it and connecting a jumper wire. It will trick the engine into thinking that the sensor is functioning correctly and allow it to start. However, it is not a recommended long-term solution and should only be used in emergencies.


How long does it take to replace a crankshaft position sensor?

The time to replace a crankshaft position sensor can vary depending on several factors. It depends on the make and model of the vehicle, the accessibility of the sensor, and the expertise of the mechanic. Usually, it may take anywhere from 30 minutes to a few hours.

How much is it to replace the crankshaft position sensor?

The cost of replacing a crankshaft sensor varies depending on the make and model of the vehicle, as well as the mechanic’s labor rates and the cost of the part. On average, the cost can range from $100 to $250.

Can I replace the crankshaft position sensor myself?

Yes, it is possible to replace the crankshaft position sensor yourself. But it is important to follow proper instructions and have the necessary tools. If you are not confident in your skills, it is best to seek the help of a professional mechanic.

What happens if my crankshaft position sensor goes out? If the crankshaft sensor fails, you may be unable to start the engine or stall while driving. The sensor provides the engine control module with information about the position and speed of the crankshaft. It is necessary for proper fuel injection and ignition timing.