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What Do RPM Sensors Do in an Engine?

Model: (Various brands) Various
Part: Checks and maintenance

Video tutorial

What is the purpose of the RPM sensor? It informs the engine of the position of the pistons and their rotational speed, allowing the ECU to calculate the ignition strategy. If it fails, the ECU will not detect the engine running.

It can be positioned on the crankshaft pulley, directly in the engine block, or on the flywheel. Modern engines have camshafts with variable valve timing, but the RPM sensor still monitors their position.

Therefore, there will be one on the crankshaft, two on the camshaft, and in the gearbox. It can also be used for ABS, connected to the wheels.


Updated on 9 July 2026 by ScegliAuto


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How to Remove the Rear Seat of a Hyundai Tucson?

To remove the rear seat of a Hyundai Tucson, follow these steps. Start by moving the front seats to their most forward position to gain space. Next, locate the release lever on the underside of the rear seat, near the floor. Press this lever down while pulling the seat upwards to unlock it from the anchor pins. Once unlocked, tilt the seat upwards and forwards to remove it from its position. Repeat this process for both sides of the rear seat. Be careful of any electrical cables or components that may be connected to the seat during removal. Once the rear seat is removed, the disassembly is complete.

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by ScegliAuto

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