This troublecode is usually related to P2 diesel platform, when you change car configuration for Fuel heater - With Timer only

This setting is usual for petrol cars and therefore there is some kind of "configuration mismatch" according to what the ECM software expect. Anyway, all works correctly and you have only this DTC code visible after readout all DTCs s thru OBD socket.

If you do not like this troublecode, then just simply configure with VDASH the Fuel heater setting to: With Timer and Additional heater