Common Toyota Avensis automatic transmission faults
1. Transmission slippage
* Symptoms: Slow acceleration, increased engine speed in low gears
*Causes: Worn friction discs, low transmission fluid, faulty solenoids
2. Jerks or jerks when changing gears
* Symptoms: Shocks or strong jolts when changing gears
* Reasons: Faulty solenoids, worn clutches, valve body malfunctions
3. Inability to change gears
* Symptoms: Transmission does not shift from one gear to another
*Causes: Faulty gear selector, faulty transmission control module, faulty solenoid
4. Rumble or grinding noise in the gearbox
* Symptoms: Noise coming from the transmission, especially at high speeds or under load
*Causes: Worn bearings, faulty differential, lack of transmission fluid
5. Transmission fluid leak
* Symptoms: Transmission fluid leaks under the car
*Causes: Faulty gaskets or seals, cracked transmission housing
6. Transmission overheating
* Symptoms: Transmission overheat warning light, burning fluid smell
*Causes: Low transmission fluid, clogged transmission cooler, faulty transmission temperature sensor
7. Failure of the electronic transmission control unit (ECU)
* Symptoms: Inability to shift gears, strange transmission behavior, malfunction indicators on the dashboard
*Causes: Electrical faults, defective ECU components
8. Mechatronics malfunctions
* Symptoms: Clutch problems, difficulty shifting gears, transmission slipping
*Causes: Worn friction discs, faulty hydraulic unit, faulty sensors
9. Problems with the hydraulic system
* Symptoms: Low system pressure, gear shifting problems, transmission fluid leaks
*Causes: Faulty pump, clogged hydraulic lines, faulty valve body