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P0299 fault code

Discussion in 'A3/S3/Sportback (8P Chassis)' started by Scottson76, Apr 1, 2014.

  1. Scottson76

    Scottson76 New Member

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    Hi I'm new to this so any help would be gratefull
    i have a 2009 a3 2.0 tdi s line 170 that has a p0299 fault code after doing some reading many people have written that it will be an actuator fault but I don't know what type of engine it is as in cr to get a replacement actuator or if anyone has any other suggestions on what it could be
    thanks
     
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  3. Flexiblemouse

    Flexiblemouse Active Member

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    P0299 seems to relate to a turbocharger underboost condition, if you find the engine code (should be on a sticker or plate near the top of the engine) someone should be able to help you out.
     
  4. Scottson76

    Scottson76 New Member

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    Engine number is Cbb 106645
     
  5. SmithyAG

    SmithyAG Active Member

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    That's the Common Rail (CR) 170 engine, code CBBB.

    Could well be an actuator fault, if it's not offering full boost. Although there are other possibilities such as a boost leak.

    Is the turbo actuator vac controlled or electronically? (can't check on my phone at the minute)
     
  6. SmithyAG

    SmithyAG Active Member

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    Found it. Part number 03L253056C It's electronically controlled. Which should rule out a vac problem but means it could be electrical issue.

    Could do with logging actual vs requested boost during a run to see what it's doing.
     
  7. Scottson76

    Scottson76 New Member

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    Cheers smithy I've got no umpff till 2500 then off as normal till 60 then into limp mode I have noticed I doesn't sound the same since this started just slightly noisier with a slight wine
     
  8. Flexiblemouse

    Flexiblemouse Active Member

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    Some questions might help narrow down the cause: is the car down on power?, is the turbo making any unusual noises?, can you hear any air/vacuum leaks in the engine bay?, is the check engine light on?

    Edit: sounds like it might be the vnt not actuating properly
     
  9. Scottson76

    Scottson76 New Member

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    Yeah the car feels like it's lost loads of power till 2500 revs then the turbo gets going but nothing when I floor it whilst driving it's like driving and 80s turbo with massive turbo lag , the coil light comes on when I hit 60 in 5 th and goes into limp mode , I haven't noticed and air noises coming from the engine but there is a a whining noise at low revs not very loud plus it doesn't sound as sweet as it did for a diesel
     
  10. Flexiblemouse

    Flexiblemouse Active Member

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    Do you have access to vcds or a Bluetooth scan tool? My best guess at this point would be a large boost leak, or something wrong with the vnt actuation.
     
  11. Scottson76

    Scottson76 New Member

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    Yeah I've got a diagnostic machine just comes up with the code and turbo under boost ,looks like I'm going to have to take it in just hoping it would be something I could do my self but sounds a bit beyond my capabilities thanks for the help
     
  12. SmithyAG

    SmithyAG Active Member

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    Where are you scottson? Somebody on here should be able to log it for you for a beer or two!
     
  13. Scottson76

    Scottson76 New Member

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    Hi smithy to be honest I wouldn't know where to start to ask someone on here
     
  14. SmithyAG

    SmithyAG Active Member

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    Sandra likes this.
  15. Scottson76

    Scottson76 New Member

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    Thanks for that smithy I will message someone and see if they can help I forgot to say before I also have a 00665 seatbelt warning light come up on my diagnostic machine would that cause the fault to make it go into limp mode thanks again scott
     
  16. SmithyAG

    SmithyAG Active Member

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    00665 isn't a seatbelt code, it's the same as P0299. There are various types of OBD2 fault codes, some are manufacturer specific, some are generic.

    If you do have a seatbelt code at the same time, I would treat it as a completely different issue and tackle one at a time. I'd start with the turbo problem P0299/00665, as it is likely to be more expensive/time consuming. The seatbelt code can wait, as long as the belts are fastening and stopping with a harsh tug.

    Have a look here 16683/P0299/000665 - Ross-Tech Wiki for more info.

    How did you get on with finding somebody local to you with VCDS?
     
  17. Scottson76

    Scottson76 New Member

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    I've found someone not to far away waiting to hear back thanks again for the help I'll let you know how it goes
     

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