What Happens If You Don’t Relearn Crankshaft Position Sensor?

The computer has to know where the crankshaft is in order to ignite the spark plugs at the ideal time, and the crankshaft position sensor provides that information. This sensor’s malfunction could result in a variety of issues. When the crankshaft position sensor is changed, it is advised to retrain it.

The ECU might not know the exact location of the crankshaft if you don’t relearn the crankshaft position sensor. Numerous issues, including the engine not starting, the engine stalling, and the engine running rough, may result from this. Furthermore, because to incorrect signals sent by the ECU, you can encounter greater issues with acceleration and additional engine damage.

The process of relearning the crankshaft is quick—it takes no more than 30 minutes. To relearn the sensor, you will want a scan instrument that can connect with the ECU. Simply follow the instructions on the screen to complete the straightforward process.

What Happens If You Don’t Relearn Crankshaft Position Sensor?
Crankshaft Position Sensor

What Happens If You Don’t Relearn Crankshaft Position Sensor?

Crankshaft position sensor relearning is not performed:

The Car Won’t Start: The ECU is impacted by not relearning the crankshaft position sensor because it depends on it for some calming power. The ECU controls a car’s ignition, therefore if something goes wrong with it, the ignition will also be compromised and the car won’t start.

The Engine Can Go Haywire: The ECU’s malfunction may result in it sending the erroneous signals to the car, which may also cause the engine to malfunction. The car may explode when an improper signal is provided to it, in addition to not starting.

Acceleration Disorder: If the crankshaft position sensor isn’t retrained, there may be an unpredictable rise or reduction in acceleration. The crankshaft becomes unreliable if the crankshaft sensor is not relearned, and this unreliability might cause you to lose control of the car’s acceleration.

When Should You Relearn Your Crankshaft Sensor?

The crankshaft position sensor needs to be relearned or reprogrammed when the diagnostic code P1336 is present.

Whether a fault code is present or not, you can relearn your crankshaft position sensor when it is replaced.

How Do You Manually Relearn a Crankshaft Position Sensor?

Manually resetting a crankshaft position sensor entails relearning without the use of a scanner, and it is possible by following the steps below:

  • First, turn off all of the car’s accessories and check to see if the air and coolant temperature sensors are within 5 degrees of one another.
  • You can start the engine once this is finished.
  • Allow the engine to idle for at least two minutes after shifting into neutral or park.
  • Then you should accelerate the vehicle to 55 mph while using part of the throttle.
  • For the engine to have enough time to warm up, you should drive at this speed for at least 10 minutes.
  • After achieving this speed, you should continue to drive for at least five minutes.
  • Then, you can slow down to 45 mph for at least a minute. Without using the brake and without setting a specific pace, this should be completed in 4 cycles.
  • Repeat the acceleration for at least two minutes at 55 mph.
  • The car should then be stopped and left to idle for at least two minutes.

How Long Does It Take to Relearn a Crankshaft Sensor?

The scanner and the vehicle have a significant impact on how long it takes to relearn a crankshaft position sensor. Relearning a crankshaft position sensor will take less than 30 minutes or up to an hour, depending on the vehicle.

The scanning process alone takes about 10 minutes when using a scanner to retrain the crankshaft position sensor. You have to finish in at least 30 minutes, scanner or not.

About The Author

Avatar for Ibrar Ayyub

Ibrar Ayyub

I am an experienced technical writer holding a Master's degree in computer science from BZU Multan, Pakistan University. With a background spanning various industries, particularly in home automation and engineering, I have honed my skills in crafting clear and concise content. Proficient in leveraging infographics and diagrams, I strive to simplify complex concepts for readers. My strength lies in thorough research and presenting information in a structured and logical format.

Follow Us:
All About Cars News Gadgets >> Auto Repair >> What Happens If You Don’t Relearn Crankshaft Position Sensor?
Scroll to Top