Hey Guys,

Ok, so I used the ol' VAG-COM to find out about the CEL on my car, and this is the response..... does anyone know what this is, and how severe? Or, can I just clear the code and move on??

on a side note, looks like my battery died as well. How difficult is it to replace??
(2000 A4 1.8T)

error code:
Control Module Part Number: 4B0 906 018 Q
Component and/or Version: 1.8L R4/5VT G 0006
Software Coding: 07251
Work Shop Code: WSC 06335
1 Fault Found:
16795 - Secondary Air Injection System: Incorrect Flow Detected
P0411 - 35-10 - - - Intermittent

 

Many people have gotten that code when their stock Bypass/Diverter Valve was dying on them.
Also a possiblility that you could have a vacuum leak. Check all your vacuum hoses for cracks, leaks, etc...

 

Skibum, im a new Audi driver, how do you use the 'VAG-COM' better still what is it. And what is the 'CEL'

 

VAG-COM is a computer software tool used to diagnose the engine and electricals within the car. It is used via your laptop and a link to the car's ecu. It's the best investment, dollar for dollar, that you can do for your car.
VAG-COM by Ross Tech

CEL = Check Engine Light

Since you're a noob, you might want to go here before you continue with this forum:
Start here.

 

Hey Brrman or Imolas4: How difficult is it to replace the bypass/diverter valve? (I haven't looked at my Bentley Manual yet), I'm just trying to get a feel for what type of job it might be. Where is it located?

 

Here you go skibum0019:

1.8t dv location.

 

Thank you!!!

 

A 20 minute job doing it the first time. Just make sure you don't break the mini hose clamps unless you have zip ties or other clamps to replace them with.

I would rank it as a 1.5 on a scale of 1 - 5 (5 being most difficult) for a first timer

 

i just have a problem even looking down past the turbo... or should you try removing the splash guards on the bottom and doing it from there?

 

Yep... go up from below on the 1.8t engine.