Hello,

 

did You had this issue? Coming this code more and more often so i need to fix it.

does anybody know what exactly need to be changed or does it need further analyse?

(2011 CR170 Dsg)

Edited 29 September, 20205 yr by Juhagpl

The throttle valve on the air inlet pipe behind the radiator gets gunged up with EGR debris.

This stops the throttle flap from operating over its full range.

 

If caught early enough it may just need cleaning, but sometimes the plastic cogs inside get destroyed & new complete unit required.

 

You need to remove it & take a look.

 

Check the electronics under the black side cover, they sometimes get covered in black conductive oil from the EGR.

It will need washing off with contact cleaner or similar .

Wash out the motor as well if oil has got in.

There's also a mod that can be done to change the orientation of the EGR port to reduce future buildup. @3T51704x4
wrote a guide to it here if you do a search.

Thanks for feedback! Is it doable at home? How difficult to clean it?

Simple, just need to scrape off the largest bits of crud.

 

Then use small brushes with solvent like brake/ carb cleaner to get it back to shiny.

 

There is a large air pipe held on with jubilee type clips at both ends that has to come off.

 

Once you have this off put some rag in the air pipe so nothing can fall into there.

 

Then remove the 3 torx type screws holding the throttle valve to the inlet pipe.

This is the guide that was written up and posted previously. Should tell you everything you need to get started.

I recently cleaned my throttle body as it was throwing up the same error code and causing a lumpy tick over. I used a can of carburettor cleaner old tooth brush, Scotch Brite and a small plastic scraper. Took me around an hour to remove clean and refit the throttle body. The lumpy tick over didn't go away for a few days until the throttle body had re-calibrated itself. Had I used VCDS and re-coded the throttle body after refitting the throttle body it would have restored the factory settings and stopped the lumpy tick over straight away. But I didn't realise that at the time.