Jaguar xf, the gearbox is broken.

This may be a problem with the transmission control module. It is recommended to go to the 4S shop of the corresponding brand to find a detector to monitor the fault code.

There are many reasons for gearbox failure: the automatic transmission is short of oil, the automatic transmission is overheated, or the one-way clutch slips and cannot increase speed, or it is stuck and cannot increase speed. First, check the idle speed of the engine, adjust the throttle line and throttle position sensor, and check whether the vacuum hose of the vacuum throttle valve is normal.