Possible causes of the error after replacing the automatic transmission:
Electrical problems:
* Incorrect installation or damage to electrical connectors
* Wiring problems (break, insulation damage)
* Malfunction of the control unit (automatic transmission control module)
Mechanical problems:
* Incorrect installation or incompatibility of the automatic transmission with the car
* Installation errors (eg incorrect oil level)
* Internal automatic transmission malfunction (for example, faulty solenoid)
Software problems:
* Unoptimized automatic transmission software
* Incorrectly installed or damaged software
Other possible reasons:
* Incorrectly performed procedure for resetting automatic transmission adaptations
* Problems with other vehicle systems that affect the operation of the automatic transmission (for example, hydraulic system, engine management system)
Troubleshooting steps:
1. Error diagnosis:
* Scan the vehicle with a diagnostic scanner to identify error codes.
*Check information about codes and possible causes.
2. Inspection and repair:
* Check electrical connectors, harnesses and transmission control module for damage or improper installation.
* Make sure that the automatic transmission is correctly installed and connected to the vehicle.
* Check the automatic transmission oil level.
3. Software update:
* Make sure that the latest software version is installed on the automatic transmission control unit.
*Update the software if necessary.
4. Reset adaptations:
* Reset automatic transmission adaptations in accordance with the manufacturer’s recommendations.
5. Further checks:
* If the error persists, additional checks may be required, such as checking the hydraulic system or other systems that affect the operation of the automatic transmission.