Get the vehicle scanned by STAR and clear all the stored codes. Drive it for a short while and re-scan.
A reputable indie will explain it all to you but a quick look seems you have an issue with the front SAM communications? Possibly loom issues to the front of the vehicle
If you have had a new engine and DPF what does the garage that fitted it have to say? Is there an Indy in your area - area not listed in your profile so cannot help on that.
Hi,
Clear all stored fault codes, replace number plate bulb, you will only be left with headlights under a SAM fault, you don't happen to have LED side light bulbs do you?