6 signs that tell your crankshaft position sensor might be faulty


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When the crankshaft is unable to send signals accurately, the engine of your car won’t function. Find out symptoms to look out for to avert this problem!

Crankshaft position sensor is a feature present in modern cars. It basically keeps track of the speed of the crankshaft’s speed. It passes signals along to the engine control unit, so it can adjust accordingly in the face of a malfunction.

When the crankshaft is unable to send signals accurately, the engine of your car might no longer function. To avoid getting to this point, there are some failure symptoms you should be observant of.

A car's dashboard

When the crankshaft is unable to send signals accurately, the engine of your car won’t function

Crankshaft position sensor failure symptoms

Modern cars are built to make use of the crankshaft’s position and speed for calculating the engine operations. It makes it easier for you to get a grasp of the sensor without the complexity of mechanical operations.

Some of the crankshaft position sensor failure symptoms include:

1. Check engine light

The “check engine” light comes on when there’s a problem with the sensor. When it’s in good condition, the light is invisible. Overheating can affect the sensor, making it to stop working. Hence, the “check engine” light will come on.

Allow the engine to cool off for some time. This will automatically cool down the sensor and the light will go off. If the light refuses to go off after cooling off the engine, consult your mechanic. There might be a deeply rooted problem with the sensor.

A car's dashboard in a red cabin

Problems of the crankshaft are sent to the dashboard with the check engine light on

2. Engine vibration

Remember that the sensor monitors the engine. What that means is, when it’s faulty, activities in the engine go unnoticed. Due to problems in the engine that aren’t detected, the engine begins to vibrate seriously. This is its own way of establishing that there’s a problem with it. The engine power can also be affected by the juddering, making a mess of the mileage recording.

3. Accelerator slow response

When the sensor is acting up, it fails to send signals regarding the cylinder positions. Invariably, a gap is created between the systems receiving and implementing data. As a result of this malfunction, the accelerator is slow to take commands. Leaving it unattended to can render it totally unfunctional.

4. Erratic to start

Erratic starting of the car is a major problem with the crankshaft position sensor. A malfunction code is sent to the computer after the sensor is gone. At first, you experience problems with starting the car. If you don’t fix it immediately, the car will refuse to start eventually. The inability of the car to start could be as a result of problems in the circuit or electrical connection.

A car parking

The crankshaft position sensor failure might halt your car from starting

5. Cylinder misfiring

Misfiring from the cylinder occurs quite often when there’s a problem with the sensor. And that’s because a disturbed sensor lacks the ability to disseminate accurate information about the position of the piston, making the cylinder to misfire.

6. Backfiring and stalling

Does your car stop abruptly while you are driving? This is a symptom of a crankshaft position sensor failure. It becomes a regular occurrence, leaving you to battle with resuscitating your car engine. You need to get it repaired immediately, otherwise, your engine will shut down completely.

Video: How to diagnose a Faulty Crankshaft Position Sensor (CKP) - 2005 Pontiac G6

>>> Check out more information about car maintenance on Naijauto.com 

Chris Odogwu




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