Help: Fault code 16795

[imported_rustys3]

Hi folks,
just done a autoscan with Vagcom on my S3 (2000) and it has logged a fault in the engine ECU.
Fault code 16795 - Secondary Air Injection System: Incorrect Flow Detected
P0411 - 35-10 - - - Intermittent

Has anyone encountered this fault code before and how to recify it.
I have an APR remap, could this cause an "incorrect flow" fault or have I a leak or something.

Cheers
Rusty

 

[HTC]

This system allows the cat to heat up more quickly on a cold start to reduce emmisions from the extra fuel required in cold engine situations.

There are a few basic checks you can do.

*Check fuse number 43 in car is okay.

*Check fuse S131 on battery is okay.

*Check the resistance of the secondary air inlet valve(N112) on the front of the engine. Resistance should be between 25-35ohms.

*Check voltage to N112 valve when engine is started.

*Check fuel pump relay (output from this relay operates secondary air relay).

*Check voltage to Secondary air pump relay

*Check voltage to secondary air inlet pump.

You may need to replace any of the above components.

 

[AndybS3]

Also check all the vac hoses

 

[imported_rustys3]

Can you please tell me where the N112 valve is located and what it looks like.
The only thing I can see coming off the Secondary air hoses is a diaphram type valve that splits into a small vacuum hose and a steel pipe going to the exhaust manifold.

Also has anyone got an electrical schematic for an S3. I've hunted everywhere but with NO joy.

Cheers
Rusty

 

[AndybS3]

Try this [image]

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[imported_rustys3]

Thanks Andy,
just what I was looking for.

Would it be possible for you to identify the other parts on the diagram or tell me where I can get the rest of the document.

Cheers
Rusty

 

[AndybS3]

PM me your email address and I'll send the doc