FMI 820 CAT Fault Code

Cause :

If the battery voltage falls below a minimum level, these memories are cleared and the TCM determines that there is a malfunction in the power supply circuit. When the engine is next started, the TCM will illuminate the MIL and set the DTC.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.