how old is the battery. how was battery unplugged while working on car might need recode back to ecu or ecu has picked up the battery getting weak, or battery is tad low while been off road, ie recharge over night see if car plays nice again, at least re code battery to car to rule it out very common with battery unplugged for system to need it, would do that before putting battery on it.Thanks.
The engine is now back together and all seems well .
The other probem however is still there.
The stop start is not working .
The fault was recorded as the brake servo pressure valve .
A new BMW/Mini part has been fitted and the cleared .
After a 40 mile drive today the stop start did not operate .
There are no faults showing after another scan.
Originally the stop start symbol would come on the dash with an explanation mark when you stoped .
This would then go out and a warning triangle would stay on untill the engine was switched off.
also would question what diagnostics platform used to scan it as some will not pick up some codes,