Common Symptoms
- Check Engine Light illuminated
- Harsh or erratic shifting between gears
- Transmission slipping during acceleration
- Speedometer fluctuating or inoperative
- Transmission stuck in one gear or limp mode
- Poor fuel economy due to incorrect shift points
Most Likely Root Causes
- Faulty input speed sensor
- Damaged or corroded wiring harness to input speed sensor
- Low or contaminated transmission fluid causing sensor interference
- Internal transmission mechanical issues affecting sensor reading
- Faulty transmission control module
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Component Location
The input speed sensor is typically mounted on the transmission case near the torque converter or input shaft area.
Manufacturer Notes
Some manufacturers require transmission fluid replacement and adaptive learning reset after input speed sensor replacement or repair.
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