Jessica Alba

Renault Espace diesel with very low power?

I have a renault espace 2.2 diesel T reg (99) the first problem is that its really sluggish i was driving down the road one day and suddenly it had lost power and now it dosent seem to pick up any power at all you can put your foot down and nothing at all iv been told it could be one of several things, MAF, MAP sensor, ECU any expert opinions on what to check? and what readings should i expect on a multimeter from sensors if i can use one?
the second problem is that the coolant light is on as if its empty but the thing is full…
not sure if the problems could be related in any way?
any help would be great, thanks