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Help: Fault code 16795

Discussion in 'A3/S3 Forum (8L Chassis)' started by imported_rustys3, May 30, 2005.

  1. 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
     
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  3. HTC

    HTC Active Member

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    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.
     
  4. AndybS3

    AndybS3 Member

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    Also check all the vac hoses
     
  5. 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
     
  6. AndybS3

    AndybS3 Member

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    Try this [image][​IMG][/image]
     
  7. 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
     
  8. AndybS3

    AndybS3 Member

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

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