- Low transmission fluid: Check the transmission fluid level and add more if necessary.
- Dirty transmission fluid: Change the transmission fluid if it is dirty or old.
- Faulty shift solenoids: These solenoids control the shifting of the gears and can become faulty over time.
- Faulty transmission control module: This module controls the operation of the transmission and can become faulty.
If the transmission fluid level is normal, the transmission fluid is clean, and the shift solenoids are working properly, then the transmission control module may be the cause of the problem.