If anyone is running one of these and their management light comes on with codes for boost sensor and/or mass airflow sensor. Check the passenger boost pipe ( its fat and runs from the engine under the power steering reservoir down further to just behing the bumper on the passenger side).
It's a very common part to fail, it splits and lets out boost pressure giving false readings. Check before buying other sensors. I've fitted three in a month.
Also beware some dealers charge 3 hours labour ontop of the air flow sensor you didn't need. They charge for bumper removal. It actually takes 20 minutes through the lower passenger side little grill.

Mk1 1.6 Turbo. Gaz shocks. Tr Lane roll bar.
Garage Owner, Lincolshire
Helper to the Scunny track day crew and North Linc's Track Day Club.
www.stokesofkelsey.co.uk