FMI 39 CAT Fault Code

Cause :

Malfunction in the thermostat control system. The on-board computer reports problems with communication with the control unit, so a possible cause may be poor contact. The cooling system circuit is open, which may affect the operation of the power unit as a whole.Vehicle in Service Mode or ON The parking assist is activated. The activation takes place through putting in the reverse gear or through operating the parking assist switch.