Dreaded Engine Management Light

[bhavin1986]

Hi all,

I'm a regular on the 8L A3 section. My brother in law just bought a 2001 B6 1.8t on Thursday, and whilst driving yesterday the dreaded engine management light came on.

So I scanned the car for faults and the following code appeared:
16795 - P0402 - Secondary Air Injection System (B2) - Incorrect flow.

Now my question is, what does this indicate has the fault? I've removed the fault code for now, with the hope that it doesn't re-appear. But if it does, what are we looking at replacing?

We're hoping that this is just a coincidence and isn't related to the previous owner!

Any help would be greatly appreciated.

Bhav

 

[benjie]

Take a look at this, should point you in the right direction!

 

[bhavin1986]

Cheers.

 

[murran]

can you hear the pump working on cold starts?

also check the little vac pipe on the egr valve.