How To Reset Camshaft Position Sensor No Start (5 Detailed Steps)

If you are a car owner, you might have experienced failure to start the engine from time to time. Even there seem to be no big issues, you just cannot get your car up and running. In that case, the problem may lie in the camshaft position sensor.

So how to reset camshaft position sensor no start? Below are our comprehensive instructions on pinpointing and fixing the problem, which is extremely helpful if you cannot call a mechanic.

What Is A Camshaft Position Sensor?

A camshaft is part of the internal busting engine, which takes the form of a metal, rotating object that operates the intake and exhaust valves. Stats regarding its performance are measured, recorded, and transferred by the camshaft position sensor.

What Is A No Start?

No start refers to a situation in vehicles when you insert the key and turn it over, but the engine cranks are all you can hear. The car has no other response to your actions and keeps stalling.

How To Reset A Camshaft Position Sensor No Start (Detailed Instructions)

  • Step 1: Look inside the engine compartment and determine the location of the camshaft position sensor.
  • Step 2: Check for any signs of physical damages. It might be dents, cracks, or distorted parts of the device.
  • Step 3: Examine the switch closely to see if it works properly. The switch is supposed to turn on and off every time the camshaft passes. If the timing is not correct, then either the switch or the crankshaft – camshaft coordination is in trouble. 
  • Step 4: Extract the camshaft position sensor from the compartment after disconnecting the battery from the negative battery terminal and removing the wires. Let the car sit for an hour, then put the sensor back to its original place. Restart the car and wait to see if it comes back to life.
  • Step 5: Should a no start persist, look at the timing belt. Do a compression test to see if the valves are marred. You can perform several readings to get the most accurate number. If it is lower than 95 psi per cylinder, then what causes the no start is the timing belt, not the camshaft position sensor per se. If this is the case, getting it replaced is your only choice.


1. How do you know my camshaft sensor is malfunctioning?

If the camshaft sensor is failing, it should exhibit the following symptoms:

  • Slower acceleration.
  • Sudden jerks and/or stalling while driving.
  • Gear lever gets stuck.
  • Failure to start.
  • Reduced gas mileage.
  • The “Check Engine“ light is on.
  • Poor drivability.

Once you have detected the signs, it is highly recommended that you get a new camshaft sensor. You can check out this article on what to do after replacing camshaft sensor for more detailed information.

2. What does a camshaft sensor do?

A camshaft sensor delivers the data concerning the movements of the camshaft back to the ECM – engine control module. From there, the ECM will calculate the timing of ignition and the amount of fuel needed in the combustion chamber.

3. What does a faulty camshaft sensor do?

A malfunctioning camshaft sensor is not capable of transmitting the necessary data to the ECM in real-time. The delay in delivery affects the accuracy of ignition timing and fuel injection. As a result, your vehicle is more likely to experience various problems concerning its power, drivability, and fuel consumption.

4. How do you test a camshaft sensor?

To evaluate a camshaft sensor, you must first have two meter probes. Place each of them on both of the sensor wires, then check out the reading. Anything from 0.3 – 1 volt is sufficient enough, and there might be some slight fluctuations. If there is no signal or the signal exceeds the range mentioned above, your sensor is not working correctly.

5. Where is the camshaft sensor located?

In most cars, you can find the camshaft sensor by looking at the right side of the engine compartment, next to the valve cover. If you want to be 100% sure, check out the service manual.

6. Is it easy to replace the camshaft position sensor?

Yes. Replacing a camshaft position sensor calls for patience, meticulousness, and a basic understanding of how cars work in general. If you have all three, then it should not cost you too much time and effort. For visual assistance, have a look at this Youtube video

7. Can you clean a camshaft sensor?

Yes, occasionally swiping up the dust and oil stuck on the camshaft sensor can improve their lifespan and minimize damages. To clean it up, you first have to disconnect the negative battery cable for safety reasons. Then, carefully remove the three wires from the sensor, and unscrew the sensor itself. Find a piece of cloth and gently put the camshaft sensor on it.

Mix water and a few spoons of solvent in a garden sprayer, and spray it all over the sensor, especially in tiny places where dirt can accumulate. Wait for a few minutes and scrub it with a dry towel. Make sure the whole gadget is thoroughly clean.

Now, open up the car hood and put the camshaft sensor back to the engine compartment. Put the screws together, and re-attach the three wires to where they once belonged. Finally, connect the negative battery cable. Your camshaft sensor should be in top condition now.


Now that you have finished reading our guide on how to reset camshaft position sensor no start, hope that the problem no longer bothers you. If your car’s camshaft sensor ever falls into the same situation, make sure to follow our advice and fix the problem. Last but not least, do not forget to send this piece around to fellow car-owners, as it might come into handy one day!

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