n249 location asap

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leonski

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• Sep 10, 2011

• #1

2005 A3 2.0 T fsi quattro
symptoms - emissions light , turbo chatter noise.
vagcom - N249 mechanical malfunction

As above, can anyone tell me where the N249 is? also, any other ideas as to what could be wrong?

Thanks

 

Lewis583

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• Sep 10, 2011

• #2

Number 23 on there mate.

 

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Leon tfsi

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• Sep 11, 2011

• #3

Cheers mate, so it's attached to the turbo. Does that mean I access it from underneath then?
Would this cause the chatter noise also? Thanks

 

audicruiser

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• Sep 11, 2011

• #4

Yes, it's normally referred to as the Diverter Valve. You will have a rubber Rev C on your car I expect which will have split. Audi released the Rev D type which is a piston and don't fail. They are around £50 and take 20 mins to change.... Your car will then have it's full boost back and no noise....

You do get to it from underneath.

 

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Leon tfsi

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• Sep 11, 2011

• #5

So that's a diverter valve. An old receipt from previous owner is for a forge diverter valve? Does this change anything?

 

audicruiser

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• Sep 11, 2011

• #6

Leon tfsi said:

So that's a diverter valve. An old receipt from previous owner is for a forge diverter valve? Does this change anything?

Click to expand...

Depends if he left it on the car... A receipt is one thing... A forge DV on the car is another!!

 

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Leon tfsi

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• Sep 11, 2011

• #7

Is there any way of knowing without looking? There is a strange thin black pipe coming off a junction near the evap sensor then ziptied along the front of the engine from right to left and then goes off down to the left of the engine somewhere? It's obviously not standard so I assumed it must be something to do with the forge dv on the receipt? Any ideas?

 

audicruiser

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• Sep 11, 2011

• #8

Leon tfsi said:

Is there any way of knowing without looking? There is a strange thin black pipe coming off a junction near the evap sensor then ziptied along the front of the engine from right to left and then goes off down to the left of the engine somewhere? It's obviously not standard so I assumed it must be something to do with the forge dv on the receipt? Any ideas?

Click to expand...

Not really, you will have to see it to know which is fitted.