If a AT malfunction is detected, first of all check the ATF level (see chapter Vehicle settings and routine maintenance). If the level is insufficient, check the condition of the respective oil seals. Carefully inspect the oil cooler and all ATF path hoses, make sure there are no signs of leaks developing. The owner of the vehicle can check / replace the information sensors of the AT control system, as well as replace the components of the AT mode selection drive. Before proceeding with the replacement of the suspected sensor, poll the memory of the control unit - all any significant failures are recorded in the module's memory in the form of DTC codes, and in especially serious cases, the AT automatically switches to emergency operation mode. DTCs are read using special diagnostic equipment connected to the on-board self-diagnosis system connector (DLC) (see chapter Engine Electrical Systems). In the absence of access to the necessary devices, it will be enough to try to at least qualitatively determine the nature of the failure (electrical/mechanical) in order to facilitate communication with car service specialists. You should not prematurely start removing AT, since its diagnosis seems possible only in the established position.