Seems that the problem the whole time was using the wrong key. Got 3 on a keyring with the car, but wasn't here for the handover. One key doesn't start the car at all, another only works when the correct side is up, and haven't tried the third key yet. All the keys are original with the Nissan molded rubber grip.
Were chips used in the 2009 series? Not used to all the new-fangled gadgets.

I just leave the turbo timer off and let the engine idle for a minute or so when I get home.

Thanks for all your help.