Before getting the spanners out again, though I'd try the pedal trick. Bearing in mind I haven't done this before on the car, I don't know if there were any codes already stored. Having said that, I was pleasantly surprised that there were only 5 codes -
0120 - Throttle/pedalPosition sensor/switch "A" circuit range/performanceProblem
0220 - Throttle/pedalPosition sensor/switch "B" circuit range/performanceProblem
1110 - Intake Manifold Valve 1 Open
1111 - Intake Manifold Valve 2 Open
1700 - Service Vehicle Soon Request from Transmission Control Module
Ignoring the last code, it would seem I have done something very silly at some point during reassembly. At least I'm hoping that's the case
I guess I'll have to go through what I've already done, but any pointers would be appreciated
Thanks for all the help and advice so far, and my ignorance shows when I thought that stupid washer was involved