To reset the crankshaft position sensor, not everyone will have a scan tool available. You may reset it without a scanner in one of two methods. Reset Crankshaft Sensor Here is the Method of How to Reset Crankshaft Position Sensor without Scanner Method 1 Acceleration and Deceleration Cycles You will be accelerating and decelerating the car at specific rates in the first way of resetting the crankshaft position sensor without a scanner. Here is a list of the method's simple steps: \tTurn off all of your car's accessories. \tKeep the coolant and air temperature sensors' temperatures close to one another. \tFor at least two minutes, let the engine idle in the Neutral or Park position. \tDrive at part throttle to an approximate speed of 55 mph. \tAs long as possible, maintain this speed to allow the engine to warm up to working temperature. \tFor a minute, reduce the speed to 45 mph. \tWithout using the brakes, go through the identical deceleration cycle four times for 25 seconds each. \tIn the 15 seconds between those deceleration cycles, return to 45 mph. \tDrive for a few minutes at 55 mph after revving your engine once more. \tYour car should be stopped and left to idle for a while. \tWithout a scanner, the crankshaft position sensor can be reset by carefully following all of these instructions. But you can look at the second option if you find the first too difficult. Method 2 Disconnecting the Battery It is true that unplugging the battery will reset the crankshaft sensor, as many people wonder. To drain the power from all the electrical components in your automobile, disconnect the negative terminal of the battery and leave it disconnected for at least an hour before reconnecting it. This includes the ECU, which will also experience short-term memory loss. When you start your engine after the ECU has lost its memory, it will relearn the location of the crankshaft sensor. Although this procedure is simple, it may take some time for all of the electrical components to lose power. If the sensor needed to be reset, both the no-start problem and the check engine light that may have come on after the crankshaft replacement should go away. You would have had difficulties starting the car, or it would at the very least stall, if the crankshaft position sensor was broken. https://www.youtube.com/watch?vF6pMlbNW7-E&ppygU3SG93IHRvIFJlc2V0IENyYW5rc2hhZnQgUG9zaXRpb24gU2Vuc29yIHdpdGhvdXQgU2Nhbm5lcg%3D%3D Frequently Asked Questions: What happens if you don't relearn crankshaft position? Failing to relearn the crankshaft position sensor can lead to various problems such as engine failure to start, stalling of the engine, and rough engine operation. Additionally, incorrect signals transmitted by the ECU can result in more severe acceleration issues and further harm to the engine. find out more... What to do after replacing crankshaft sensor? Ensure that the crankshaft sensor replaced correctly and have to be relearn. Find it in detail... How do you manually relearn a crankshaft position sensor? Find it here... What scanner can relearn crankshaft position sensor? With the vast array of OBD 2 scanners available in the market today, it can be difficult to choose the appropriate one for your car's engine. However, fret not, as we will explore a few scanning tools that have the capability to relearn the crankshaft position sensor. Find it out the details..