Hello there,
So, put a battery in the Subaru and fired it up, started fine, tick over was normal, let it come up to temp then I went down the drive to move the car out so I could wash it, parked it up, gave it a clean in and out. Went to move it back and the check engine light came on. Error 22 and 23 (air flow and knock)
Hope it's just upset about being left for 6 months or some water has worked its way in the big hole in the bonnet...
Disconnected the batter when I left so the ECU should be reset, I'll try again tomorrow but it's MOT time first thing!
If it still there, am I okay to drive it off boost to the MOT and back? Will revving it for the emission test annoy it or cause it to run rich?