Ford custom Sid208 u2101

Hello

Don’t I wish I didn’t update the software!

Ever since I updated the pcm I now have engine malfunction and fault u2101

Can anyone help

I have changed the software again and also changed it to a different vehicle, still the same fault code

No problem in any other unit, no faults or communication errors

I updated with ids as well so I can’t understand what’s gone wrong!

Thanks