Welcome to the forum.
If this is relevant to your vehicle; try this:-
For Lucas DCN2 as fitted to DW8B engine in Partner vehicle, this code is geberated as a result of fuse number 2 in the engine fuse box being present. This is a hard fault code and will not clear. Remove the fuse from the engine fuse box (it should never be fitted), clear the fault codes. Disconnect and reconnect the battery, allowing the 3 minute rule etc.
Retest and read faults after connection.