The output shaft of the transmission on the Nissan Sentra Speed Sensor monitors rotation and relays vehicle speed data. The sensor functions so the computer can schedule gear shifts, control line pressure, and regulate torque converter clutch engagement for smooth driving performance in the Nissan Sentra. The Speed Sensor provides real-time output shaft speed within the Nissan transmission sensor network. The sensor detects the reluctor's turning on the output shaft. The output shaft turns, and the sensor generates pulses representing speed. There are two styles, including a permanent magnet sensor that produces a sinusoidal signal and a reed style unit that switches with magnetic interference; both produce accurate speed pulses. It is engineered with a compact design that will fit into Sentra drivetrains without the need to modify any of the surrounding components. The Speed Sensor is shielded from the transmission fluid by proper housing sealing. Should the Speed Sensor signal become obstructed or inaccurate, the shift timing may be incorrect. This, in turn, will result in hard shifts or the absence of upshifts. The Nissan Sentra's automatic transmission and the vehicle control system depend on the relevant data fed by the Speed Sensor for optimal operation.
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