The crankshaft angle sensor measures the rotation speed and location of the crankshaft. This information is used by the fuel and ignition systems. Starting issues that are difficult to diagnose are commonly traced to intermittent or random faults in the crank angle sensor or its wiring and connections.

Mechanics' Corner: More Technical Detail

The crankshaft sensor can be mounted near the crankshaft itself or inside the distributor. It measures the speed and revolutions of the crankshaft and sends this information to the ignition module, which uses the information to determine when to fire the ignition coil.

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