could anyone possible help? My car acts and drives pretty well around town a slight loss of power and a bit smokey out the exhaust on start up. The main problem is that on motorway driving if a constant speed is maintained the turbo will cut out, no dash warning lights come on at all. If i pull over and stop the engine, on re-start it will be working fine until constant speed is maintained again.
I have managed to get a local garage to plug a computer in to it and the fault codes are as follows: 4191 turbine control flap activation,: 4521 charge air pressure control small turbo control deviation and: 3ff0 air mass flow sensor. I believe that it is probably only the first fault that is the problem or at least it is the best place to start, has anyone else come across this problem? what part am i looking at? what will it cost? what does it mean?
Thanks for looking