Which statement regarding the crankshaft sensor is correct?

The crankshaft sensor plays a critical role in modern engine management systems by providing essential data to the engine control unit (ECU). The correct statement recognizes that the crankshaft sensor is responsible for sending engine speed data to the engine computer. This information is vital for the ECU to adjust fuel injection and ignition timing, ensuring optimal engine performance and efficiency.

Additionally, the sensor is typically mounted near a reluctor ring, which is integral to its operation. The reluctor ring, attached to the crankshaft, generates varying magnetic fields or specifically shaped patterns, which the sensor interprets to determine the position and speed of the crankshaft. This setup is necessary for precise engine timing and coordination between the engine's various systems.

Thus, the statement acknowledges both the function of the crankshaft sensor in relaying engine speed data and its physical requirement to be located near a reluctor ring, making "Both A and B" the most comprehensive answer.