Yes, engine speed may fluctuate due to problems with the automatic transmission.
Possible reasons:
* Torque Converter Malfunction: The torque converter transmits power from the engine to the transmission. Its malfunction can lead to fluctuations in torque, which is reflected in engine speed.
*Speed Sensor Problems: Faulty speed sensors, such as input or output speed sensors, can provide incorrect information about vehicle speed, which affects the automatic transmission’s control logic and causes the transmission to shift at the wrong time.
* Problems with the automatic transmission control unit: The automatic transmission control unit receives data from various sensors and controls the operation of the gearbox. Its malfunction can lead to incorrect gear shifting and fluctuations in engine speed.
*Clutch Slip: Some automatic transmissions use clutches to change gears. If the clutch slips, it can cause loss of power and fluctuations in engine speed.
*Low Transmission Fluid Level: Low transmission fluid levels can cause insufficient pressure in the automatic transmission system, which can cause clutch slippage and fluctuations in engine speed.
Symptoms associated with floating speed due to automatic transmission:
* Engine speed fluctuates when idling or while driving.
* The transmission jerks or shifts with delays.
* The automatic transmission fault indicator may come on.
*Loss of power when accelerating.
If you find floating speed along with any of these symptoms, it is recommended to contact a car service for diagnosis and repair.