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[Webby the Bear]

Evening chaps. My mate has this code come up. Cars running absolutely fine but CEL illuminated.

What's the waste gate set up on these?

Ps it's a 1.6 td of 2010 vintage 😀

[Marks DTM Calib]

Waste gate pmsl.....how very 20th century 

Check and clean the boost pressure sensor and associated drillings.

[al brown]

Would this not be a variable vane turbo like the earlier ones?
As already said I would be checking the boost sensor, live data should show up a problem. Often will show up a difference in readings between atmospheric and boost pressure with the engine off but not always.
Al

[Webby the Bear]

Thanks guys will clean boost sensor. I've not much experience with live data. So I'm looking for map pressure when off. This will confirm sensors reading wrong?

[Andy H]

If the turbo is anything like the one on our 1.9tdi galaxy then the vanes that control the boost will be caked up with a mixture of carbon and rust

[Marks DTM Calib]

That does not tend to happen as much on the later ones, I suspect the regen cycle for the DPF burns the soot off.

What does happen is the boost sensor gets cruded up and does not respond very fast.

Other issue of course with thses lumps is total turbo failure and an appetite for injectors                         

[Webby the Bear]

Cheers chaps. Any idea where it's located? The boost sensor that is. And presumably it works like a MAp sensor??

I've cleared the code and it's not come back on yet

[al brown]

Not sure where the sensor is on the later model, should be somewhere between turbo and inlet. With engine off the boost and atmospheric pressure should read the same, at idle boost pressure will drop slightly normally as the inlet is under a slight vacuum as the turbo isn't boosting. There is often a reading for requested boost pressure to give you an idea of what the reading should be through the revs and although it won't match exactly, boost pressure should follow roughly and be a fairly smooth graph.
Al

[Webby the Bear]

Thanks Al, I'm going to be honest that's quite complicated for a man who is only interested of late in doing servicing, brakes, tyres etc of late  but I'll run some live data and see what I can see. Cheers mate 

[al brown]

Let me know how you get on, I'll help where I can. I can give you a call if needs be, easier that way when your next to the car.

[Webby the Bear]

Thanks al much appreciated. I'm not going to see it til next week now anyway but if I get stuck I'll pm you then bell you