Possible reasons for automatic transmission switching:
Mechanical faults:
* Wear or damage to internal automatic transmission components, such as:
* Hydraulic control unit
* Solenoids
* Gear disc brakes
* Automatic transmission fluid leaks leading to insufficient hydraulic pressure
Electrical faults:
* Damage to electrical wiring or sensors associated with the automatic transmission
* Faulty automatic transmission control module (TCM)
Software problems:
* Bugs in TCM software
* Incorrect TCM flashing
Other possible reasons:
* Malfunction of the accelerator pedal or throttle cable
* Problems with the traction control system
* Defects in the body or chassis that may affect the operation of the automatic transmission
Diagnostics and troubleshooting:
* Connecting a diagnostic scanner to the OBD-II port to identify trouble codes
* Checking the level and condition of the automatic transmission fluid
* Visual inspection of the automatic transmission for leaks or damage
* Checking electrical wiring and sensors associated with automatic transmission
* TCM software update according to manufacturer’s recommendations
Recommended actions:
*Consult a qualified mechanic to diagnose and repair the problem.
* Avoid driving a vehicle with an automatic transmission that starts automatically as this may cause further damage.
* Regularly service the automatic transmission in accordance with the manufacturer’s recommendations to prevent malfunctions.