Hi, I had a similar problem with my Renault Clio, coming up with all sorts of codes. One code that kept coming up time and time again was the MAP sensor. which was changed 3 times until myself and Diggin Deeper (who I will be eternally grateful too) took the throttle body off and cleaned the idle sensor. And hey presto the car has been running trouble free for months now!!
There seems to be a problem with the sensors on the renaults, that are totally misleading. The code could tell you it's one particular sensor, when it's actually not that sensor at all. As with my case!! All I'd suggest is go through all the sensors one by one, unplugging and plugging in again, could just be a loose connection. http://www.renaultforums.co.uk/
This was a really big help to me, when I was having problems. There are a lot of "renault" knowledgable people on there.