Signs of a faulty automatic transmission speed sensor:
* Unstable engine speed and gear shifting:
* Engine speed fluctuates or increases/decreases spontaneously.
* Gear shifts are jerky or delayed.
* Slipping or jerking when shifting gears:
* The transmission slips or jerks when changing from one gear to another.
*This may indicate that the sensor is not sending the correct signals to the ECU for smooth gear shifting.
* Automatic transmission overheating:
* Due to incorrect RPM sensor readings, the automatic transmission may overheat due to excessive slippage or incorrect gear shifting.
* Emergency mode of automatic transmission:
* If the automatic transmission speed sensor is faulty, the ECU may put the transmission into limp mode to prevent further damage.
* This may limit the functionality of the automatic transmission or cause it to only move in one gear.
*Check Engine Light comes on:
* A malfunction of the automatic transmission speed sensor can result in trouble codes that will illuminate the engine malfunction indicator.
Other symptoms:
* Difficulty starting
*Loss of power during acceleration
* Noise or vibration coming from the transmission