Common automatic transmission selector faults
1. Does not switch to the desired position
* Worn or damaged shift mechanism components
* Problems with wiring or sensors
*Transmission control module (TCM) malfunction
2. Stuck in a certain position
* Broken or worn pawls or latches
* Faulty lockout solenoid
* Problems with TCM
3. Shifts with delay or jerks
* Worn clutches or clutches
* Clogged valve body
* Faulty input or output shaft speed sensor
4. Switches to the wrong position
* Faulty damper circuit
* Faulty shift selector
* Problems with TCM
5. No indication of the selected position
* Faulty selector position sensor
* Faulty selector position indicator
*Wiring problems
6. Transmission fault warning light comes on
*Need to reset TCM adaptation values
* Mechanical transmission failure
* Faulty TCM
Other possible faults
* Stretched or torn selector cable
*Broken or worn selector clutch
* Faulty Engine Control Unit (ECU)
Causes of malfunctions
* Component wear due to natural aging or mileage
* Improper maintenance or replacement of transmission fluid
* Mechanical impacts or collisions
*Lack of necessary power supply or grounding
Consequences of malfunctions
*Difficulty shifting gears
*Transmission damage
* Reduced vehicle performance and safety
* Increased repair costs