Possible causes and solutions:
1. Low transmission fluid level:
* Check the fluid level in the gearbox.
*If necessary, add the correct type of fluid specified in the owner’s manual.
2. Gear shift cable malfunction:
* Inspect the cable for damage or binding.
* If necessary, adjust or replace the cable.
3. Solenoid contamination or wear:
* Solenoids control the flow of fluid in the transmission.
* Replace faulty solenoids.
4. Brake band wear:
* The brake band holds the gearbox in park.
* Replace worn brake band.
5. Position switch malfunction:
* The position switch informs the transmission control unit of the current position of the gearshift lever.
* Replace the faulty switch.
6. Control unit malfunction:
* The control unit controls the operation of the gearbox.
* Carry out computer diagnostics and, if possible, repair or replace the control unit.
7. Wear of planetary gears:
* Planetary gears are used to transmit torque in the gearbox.
* Replace worn planetary gears.
8. Mechanical faults:
*In rare cases, mechanical problems such as broken gears or shafts may occur.
*Repair will require disassembly and inspection of the gearbox.
Note:
*Always have your automatic transmission diagnosed and repaired by a qualified mechanic.
*Attempting to make repairs yourself may result in further damage.