The DTC P2263 is a generic code for poor boost performance. What this means is that there is not a specific item giving a bad reading but something in the system as a whole is not correct. I have a Vauxhall Vivaro (Renault Traffic / Nissan) that could not pull the skin off a rice pudding. It ran sort of OK if you cleared the codes but it did not sparkle as it should. When the Mil light came on the vehicle went into LOS (limited Operation Strategy) and it took a long time to accelerate and I had to change gear when the revs approached 2000. The turbo made the right kind of whoosh noises at start up etc and the idle was perfect, no smoke, and it started on the button; just no grunt at all. The answer was a small T piece had broken in the vacuum lines connecting several sensors / valves...you see now why the generic code popped up. My advice is: If you get P2263 do not panic - think SYSTEM not COMPONENT - the answer is in the code. Best of luck.
SOURCE: Error codes p0045 and
i would not take these code readings as gospel on a renault ,if this vehicle is a 2008 then its impossible to read any codes for this vehicle without connecting to the internet and then to the renault factory who call the IP back to ensure its a dealer ,then operators fingetprint is taken to confirm .Only people who can read a code are renault (europeon market vehicles) ,if turbo not working then its a mechanical fault here on this model ,check the air pipes and block off the EGR valve with a nice coca cola can home made gasket and see how it runs
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