Possible causes of jerking during acceleration in a Toyota Corolla with an automatic transmission:
Transmission problems:
* Faulty torque converter
* Worn or damaged friction discs
* Problems with gear shift solenoids
*Low transmission fluid level
Engine problems:
* Faulty spark plugs or ignition coils
* Dirty injectors
* Vacuum leaks
Electronics problems:
* Faulty wheel speed sensor
*Faulty throttle position sensor
* Engine control unit (ECU) failure
Other possible reasons:
* Dirty fuel system
*Weak or dead battery
*Worn tires
* Suspension problems
What to do:
1. Check the transmission fluid level: Make sure the fluid level is at the correct level. If necessary, add special fluid for automatic transmissions.
2. Diagnosis with Scanner: Connect the diagnostic scanner to the vehicle to identify any errors or trouble codes.
3. Inspect and Clean Sensors: Inspect and clean wheel speed sensors, throttle position sensors and other sensors that may affect transmission performance.
4. Inspect Friction Discs: Inspect the transmission friction discs for wear or damage.
5. Contact a mechanic: If you cannot determine the cause of the jerking, contact a qualified mechanic for diagnosis and repair.