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How to Test a Crankshaft Position Sensor (Step-by-Step)

Updated: Feb 7

✔ This article has been fact checked.

The crankshaft position sensor, also known as the engine speed sensor, is an important component in your vehicle's ignition system. It's responsible for monitoring the position and rotational speed of the crankshaft, it sends this data to the engine control module (ECM).

If the sensor is not functioning properly, it can cause issues with your vehicle's ignition timing, fuel efficiency, and overall performance.

There are two ways to test a crankshaft position sensor, depending on whether you have an inductive or hall-effect sensor. You will need a digital multimeter to complete the test.

In this guide, we will show you how to test a crankshaft sensor step-by-step to determine if it is functioning correctly. Before beginning, make sure to gather the necessary tools and materials, and refer to your vehicle's service manual for specific instructions and safety guidelines.

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