The emergency mode of the automatic transmission is activated when:
* The on-board computer detects a serious malfunction in the automatic transmission or other related systems.
* To protect the transmission from further damage, the automatic transmission electronic control unit (automatic transmission ECU):
*Limits the number of gears available for use.
* Starts the automatic transmission only in one or two gears.
* Reduces torque transmitted to the wheels.
* To inform the driver about the need for repairs and service.