Camshaft Position Sensor Symptoms, Diagnosis, Replacement Cost-2024

Are you familiar with the definition of a camshaft position sensor? If not, don’t panic. A lot of car owners need to be made aware of this small. But it is an important detail that keeps their engines operating.

I’ll explain what a camshaft position sensor is. How does it operate? Why did it malfunction? And what happens when it does? In this post. I can also show you how to identify and repair a malfunctioning camshaft role sensor and how much it will cost.

So, buckle up, and permit’s get started!

What is a Camshaft Position Sensor Symptoms, and How Does it Work?

A camshaft position sensor, or CPS for short. It is a small electronic device. Its video displays units, such as the position and velocity of the camshaft. The camshaft is a long steel shaft that rotates and opens and closes the valves inside the engine.

The CPS sends a signal to the engine manipulation module (ECM), the PC that controls the engine. The ECM makes use of the movement to determine the most efficient timing. It also determines fuel injection for each cylinder.

There are commonplace sorts of camshaft position sensors: hall impact and magnetic. Hall impact sensors use a magnet and a semiconductor to generate a digital signal. Magnetic sensors use a coil and an appeal to generate an analog signal.

Both sensors mount close to the camshaft at the engine block or the cylinder head. They related to the ECM with the aid of a wiring harness.

Why is the Camshaft Position Sensor Important?

The camshaft position sensor is critical. It facilitates the ECM to optimize the engine performance and gasoline efficiency. The ECM can regulate the timing and fuel injection for each cylinder. It is by knowing the exact role and speed of the camshaft.

This ensures that the engine runs with minimal emissions and top-of-the-line electricity acceleration. It additionally prevents the engine from stalling, misfiring, or knocking.

The camshaft role sensor also works together with the crankshaft role sensor. So, the video display units the position and pace of the crankshaft. The crankshaft is another steel shaft that rotates the pistons within the engine.

The ECM compares the signals. From each sensor, verify the timing and synchronization of the engine. This is crucial for the machine’s proper functioning in modern-day engines that use variable valve timing (VVT) systems.

VVT systems allow the engine to alter the valve timing and lift in step with the riding conditions. This improves the engine performance, gasoline performance, and emissions. But, VVT systems depend upon correct alerts from the camshaft. And crankshaft position sensors to paintings.

Camshaft Position
Photo Credit : Auto Trends Magazine

What are the Symptoms of a Bad or Failing Camshaft Position Sensor?

· A horrific or failing camshaft function sensor can cause many problems in your engine. Some of the commonplace signs and symptoms are:

· • Check engine mild on :

· This is the most obvious sign that something is incorrect together with your engine. The ECM will stumble on a defective camshaft role sensor and keep a trouble code in its memory. You can use a test device to examine the code and determine the problem’s purpose.

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· • Engine stalling or hard beginning:

· A defective camshaft position sensor can cause the ECM to lose the tune of the camshaft role and speed. This can affect the timing and fuel injection for each cylinder. Resulting in harmful combustion and engine stalling. You may also have trouble beginning the engine. In particular whilst it’s miles bloodless or warm.

· • Reduced strength or acceleration:

· A faulty camshaft position sensor can also affect the engine’s performance and energy. The ECM may not be able to adjust the valve timing and lift. This results in much less air and gas getting into the cylinders. This can reduce the engine energy and acceleration. It makes your car sluggish and unresponsive.

•       Poor gas economic system or multiplied emissions:

A defective camshaft position sensor can also affect gasoline efficiency and your engine’s emissions. The ECM won’t be capable of optimizing the gas injection. Combustion for each cylinder results in greater gas intake. Also, it results in extra dangerous gases being launched into the atmosphere. This can increase your gas expenses and damage the surroundings.

• Rough idle or misfires:

A faulty camshaft function sensor can also cause the engine to run roughly. The ECM might not be capable of synchronizing the camshaft and crankshaft alerts, resulting in abnormal valve commencement and closure. This can cause the engine to idle roughly or misfire. It makes your automobile shake and vibrate.

How do you diagnose a faulty camshaft position sensor?

If you suspect your sensor is defective, you may conduct tests to confirm your diagnosis. Here are the steps and equipment you may need:

· Scan tool:

· An experiment tool is a tool that connects to the diagnostic port of your car. It reads the hassle codes and information from the ECM. To see if there could be a code, such as P0340, P0341, P0345, or P0346. These are connected to the camshaft function sensor; you can use an experiment device.

· Visual inspection:

· A visual inspection is simple. However, it is an effective way to check the circumstances of the Camshaft Position sensor. You can find the sensor at the engine block or the cylinder head near the camshaft. You can then inspect the sensor and its wiring for any signs. After symptoms of damage, corrosion, or free connections. If you find any, you should update or repair them as workable.

• Multimeter or oscilloscope:

A multimeter or an oscilloscope is a device that measures the electric resistance. You can use a multimeter to test the camshaft function sensor and see if it’s far operating. After joining the device’s probes to the sensor’s terminals, you will want to disconnect the sensor from the wiring harness. You can then degree the resistance and voltage of the sensor. And examine them with the specifications of your automobile’s guide. If the readings are out of variety, the sensor is faulty and needs to be replaced.

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• Signal evaluation:

A sign comparison is a technique that compares the camshaft role sensor sign. It is with the crankshaft position sensor signal. You can use an experiment device or an oscilloscope to screen each call and spot if they may be in sync. You also can use a timing mild to check the ignition timing and see if it suits the camshaft position. If the signals aren’t in sync or the timing is off, the sensor is defective and desires to be replaced.

Camshaft Position
Photo Credit : Camshaft Position

How Much Does it Cost to Replace a Sensor?

The fee of changing a camshaft position sensor relies upon several elements. This includes

the make and model of your car, the area and accessibility of the sensor, and the kind and friendly of the sensor.

Here are a few estimates of the expected value of changing a camshaft position sensor:

• Parts value:

The parts fee of a camshaft role sensor ranges from $20 to $ 200, depending on the sort and brand of the sensor. Hall impact sensors are less expensive than magnetic sensors. Occurring sensors are usually cheaper than unique system producer (OEM) sensors. But, you should pick a sensor that is like-minded with your automobile. This meets the excellent requirements.

• Labor cost:

The labour value of replacing a camshaft position sensor tier is from $50 to $150. Relys on the place and accessibility of the sensor. Some sensors are clean to reach and update. At the same time, others may additionally need to drop other additives. The value of hard work also relies upon the mechanic’s hourly price and the job’s complexity.

• Total cost:

The total cost of replacing a camshaft function sensor level is $70 to $350. You are relying on the components and complex work expenses. This is a low-priced repair in comparison to other engine troubles. But, you usually have to save round and examine the charges—critiques of various components, suppliers, and mechanics before choosing one.

How do you save money on replacing a camshaft position sensor?

Replacing a camshaft function sensor is a relatively inexpensive restore. But you could still save some money by using the following these hints:

• Do it yourself:

If you have the abilities and tools, you can update the camshaft position sensor yourself. You can observe the steps and instructions in your vehicle’s guide or online courses. But you should only do that if you are confident and comfortable with the venture. Otherwise, you may threaten the sensor or the engine and pay more for the restoration.

• Maintain the sensor and the engine:

The first way to store money on changing a camshaft sensor is to prevent it from failing inside the first area. You can do this by maintaining the sensor and the engine often. You must check the sensor and its wiring for

any signs of harm, corrosion, or loose connections and replace or restore them as soon as possible. This will maintain the sensor and the engine smooth and lubricated. Also, it will increase their lifespan.

How to Replace a Camshaft Position Sensor?

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If you have identified a defective sensor, you may want a few equipment and abilities to do the process. Here are the stairs and tools you will need:


You will need

1. a test tool,

2. a ratchet,

3. a socket set,

4. a screwdriver,

5. a multimeter or an oscilloscope,

6. a brand new Camshaft Position sensor.

You can buy the sensor from a good parts provider or online. Make sure you pick a sensor that is well-matched together with your automobile.


Disconnect the poor battery cable to save you any electric shocks or sparks.

Locate the Camshaft Position sensor at the engine block or the cylinder head. (near the camshaft). You may also need to dispose of some components or lift the engine to get entry to the sensor.

Disconnect the wiring harness from the sensor. Also, dispose of the mounting bolts or screws. These steps keep the sensor in location.

Pull out the vintage sensor and look into it for any symptoms of harm or put on. You can also look at it with a multimeter or an oscilloscope to affirm that it’s miles defective.

Install the brand-new sensor and secure it with the mounting bolts or screws. Make sure the sensor is aligned and seated.

Reconnect the wiring harness to the sensor and reconnect the poor battery cable.

Use a scan device to clear the trouble codes and reset the ECM.

Start the engine and test if the signs and symptoms are long gone. You can also use a scan tool or an oscilloscope to reveal the camshaft function sensor sign. After spotting if it is normal and in sync with the camshaft position sensor sign,

Tips and Cautions for Replacing a Camshaft Position Sensor

Replacing a Camshaft Position sensor is a relatively easy task. But you must follow a few suggestions and cautions to avoid fakes or injuries. Here are some of them:

• Wear safety glasses and gloves:

You should always wear safety glasses and gloves whilst running to your vehicle’s engine. This will defend your eyes and hands from any particles (oil or sparks)

• Work on a cold engine:

It would help if you always worked on a chilly engine when replacing a Camshaft Position sensor. This will prevent you from burning yourself on the recent engine components. Also, it causes harm to the sensor or the engine because of thermal growth or contraction.

• Follow the torque specs:

It would help if you always observed the torque specs. It is while tightening the mounting bolts or screws of the camshaft function sensor. This will ensure that the sensor is secured and sealed.

• Use excellent components:

You have to use the best components whilst replacing a Camshaft Position sensor. You must use something other than reasonably priced. It would help if you used OEM or equal sensors, as they meet the specifications and standards of your vehicle’s manufacturer.

Conclusion – Camshaft Position

The Camshaft Position Sensor Symptoms are minor. It helps the ECM optimize engine performance. Also, the fuel performance works with the crankshaft role sensor.

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