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I am hoping someone can shed some light on this. I have an active trouble code ECM-P226200 Turbocharger Boost Pressure Low and not sure how to fix it.

The problems started months ago when I would get hiccups during acceleration which over time got more frequent. A few times the car wouldn't start, it would turn over splutter into life and promptly stall again, eventually start and run fine for a long period. After sometime the car went into limp mode permanently and really struggled to start and run, it was drivable but only just.

I took the car into a garage who diagnosed 9 trouble codes and fixed 6 of them by changing the crank sensor. This sorted the hiccups and starting issue immediately, however, the car still goes in and out of limp mode (tortoise) whilst driving. When not in limp mode and I accelerate sharply if goes into limp mode and out again when I drive more sedately after that. If I floor it toward redline it gets to 3-3500 rpm and wont rev further (tortoise on) but if I gradually accelerate it will rev up to redline, sometimes spluttering on the way up the revs.

At the moment the car is pretty much drivable, most people wouldn't notice a problem (if the tortoise was not on), but if you drive spiritedly it is not well.

I am assuming there is a leak in the turbo plumbing or a sensor that is faulty?

Thanks
Alan
 

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Hello Prost and welcome to the forum. I would suspect that your turbo valve is faulty. It is probably stuck in the open position so boost is not building up. You could read the boost pressure value with an OBD II adapter while driving and see if this is the issue. What are the 3 codes that still remain active?
 
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