JJCNSX

Dear all,

Please help if you can. this seems to be a very common problem here with B5. Mine is 98.5 2.8Q with 110k miles on it.

A few months ago, my annoying check engine light came on, and it has been on and off since.. (stays on for about 1-2 week, and off for 3 days, and repeat itself all over again)..

Can someone please help me on this matter..? What should i do?

Here is the VAG reading:

----
VAG-COM Version: Release 303.1


Chassis Type: 8D - B5 Audi A4
Scan: 01,02,03,08,15,17,25,35,45,46,55,56

Address 01 -------------------------------------------------------
Controller: 4D0 907 551 AH
Component: 2.8L V6/5V MOTR HS D01
Coding: 06201
Shop #: WSC 06335
2 Faults Found:

P1559 - 35-10 - - - Intermittent
16716 - Knock Sensor 2 (G66): Signal too Low
P0332 - 35-00 - -
16795 - Secondary Air Injection System: Incorrect Flow Detected
P0411 - 35-00 - -
Readiness: 0000 0101

mnemonic

16795 follow the Combi valve and look for a tear in the vac hose

BigEd

<ul><li><a href="http://search.audiworld.com/index.html?q=16795&amp;u=&amp;s=all&amp;cat=010001 &amp;db=1999-01-01&amp;de=2005-10-04">here</a></li></ul>

JJCNSX

Thank you for speedy reply.. this problem has been bothering me for a long time, .. exactly what is a Combi valve?

what does it do? I have a 2.8Q...

i will also check on the vaccum lines.. (any picture of where they are located?)

Please help. thx!

shwndh

They'll repair it for free. Got rid of codes on my 2.8Q.

JJCNSX

came back on

shwndh

take it back.