On 15/06/2020 16:35, Dave Plowman (News) wrote:
In article ,
Jim GM4DHJ ... wrote:
My car started and ran ok after removing the battery for a couple of
weeks, must have non volatile memory in the ECU.
.

still have to relearn a few things though .....

What would that be, Jim? It may revert to ignition timing for low octane
fuel, until the knock sensors tell it otherwise. An auto gearbox might
learn how you normally drive to some extent. But all that sort of thing
would update very quickly.

em the door opening drop in the windows in the Mustang ...etc....