Possible reasons why the automatic transmission starts from second gear:
Transmission problems:
* Faulty torque converter: Responsible for transferring power from the engine to the transmission.
* Worn clutches: Transfer power from one planetary gear to another.
* Faulty solenoids: Control gear shifting.
Electronics problems:
* Faulty Transmission Control Module (TCM): Controls the operation of the transmission.
* Broken or damaged wiring: Interferes with the transmission of signals between the TCM and transmission.
Oil problems:
*Low oil level: May cause slippage and slow gear shifting.
* Contaminated oil: May cause solenoids and valves to malfunction.
Other possible reasons:
*Faulty throttle position sensor: Provides the TCM with throttle position information.
*Faulty Speed Sensor: Provides the TCM with vehicle speed information.
* Clutch slipping: This can occur if the clutch is worn or not adjusted correctly.
What to do:
* Check the level and condition of the automatic transmission oil.
* Scan your vehicle for trouble codes.
*Consult a qualified mechanic to diagnose and repair the problem.