Obd2 code p0299 Turbo underboost
 

This message came up after I had accelerated hard and suddenly lost power as the car went into safe mode,as most of you thought , this is going to be expensive.
Wrong ,forget all the sensors bearings , solenoids etc . The solution is simple ,

The main air intake pipe from the air box to the turbo is collapsing at one or both ends as:jump: you floor the accelerator .this is because the turbo sucks all of the air out of the pipe rapidly and atmospheric pressure compresses the pipe cutting off the air supply .

Hence Turbo Underboost......

The solution ....Cut to size a piece of 3inch and a piece of 2inch diameter plastic drain pipe
(Sizes may vary from car to car ) and insert into the ends of the air pipe fix in place with a screw clip or good cable tie ,reattach to car and rev away to your hearts content.
Hope this helps, keep in touch

Regards amalgam21