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Secondary air injection pump

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Old 09-01-2017, 06:41 PM
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Default Secondary air injection pump

Does anyone have a light on for this. What did you do to resolve it. Previous owner said it was a relay. I can hear the pump running when I start the car. If the relay was bad would the pump still work?
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Old 09-02-2017, 03:53 AM
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Originally Posted by Bigddiesel View Post
Does anyone have a light on for this. What did you do to resolve it. Previous owner said it was a relay. I can hear the pump running when I start the car. If the relay was bad would the pump still work?
"light on" ?

What code?

More likely a vacuum leak going to the valves, than the relay.

Check hose #4 here >>

quattroworld.com Forums: At idle >>
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Old 09-06-2017, 12:51 PM
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This thread helped me sort out a low vacuum problem and SAI codes, I posted about it on the QW D2 forum. Also my car was sluggish due to the intake flappers being in the wrong state at low RPM. Thanks!

Originally Posted by silverd2 View Post
"light on" ?

What code?

More likely a vacuum leak going to the valves, than the relay.

Check hose #4 here >>

quattroworld.com Forums: At idle >>
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Old 09-10-2017, 12:35 PM
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Think I found the problem. Hose running from the pump to the combi valve was collapsed where it connects to valve. There was also a hole in it about 3 inches from the end of it
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Old 09-23-2017, 06:00 PM
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Default Light back on again

so the sai code came up again. Says bank 2 on a generic code reader. Will the vagcom software be more specific in telling me the problem or will it just tell me the same thing. Is bank 2 the passenger side ? Is it possible it could be the relay. Previous owner had it at a dealer and was told it was the relay.
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Old 09-24-2017, 06:02 AM
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Originally Posted by Bigddiesel View Post
so the sai code came up again. Says bank 2 on a generic code reader. Will the vagcom software be more specific in telling me the problem or will it just tell me the same thing. Is bank 2 the passenger side ? Is it possible it could be the relay. Previous owner had it at a dealer and was told it was the relay.
Bank 2 is the driver's side.
The relay just turns on the pump ... the valves are vacuum operated.
Even a generic reader should give you a code, like "P1111" or "11111" ... Bentley manual will elaborate on possible causes for the code.
You may notice (or will learn) that most "professional" mechanics are morons...or disbarred lawyers that need another job that involves telling lies.

Last edited by silverd2; 09-24-2017 at 06:07 AM.
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Old 09-24-2017, 06:57 AM
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What exact code do you have?

As per the troubleshooting link above, do you have good strong vacuum at that solenoid?
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Old 09-26-2017, 06:11 AM
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P0492 bank 2
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Old 09-26-2017, 08:53 AM
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OK good so far. Next check vacuum as per the link above. First you can note if your flapper actuators are in "full suck" at idle, if not there is probably no vacuum to them and the EGR is downstream from there.

The vacuum lines to the valves themselves (behind the heads, both sides) also get cooked and fall apart at the far end. I have replaced mine with silicone to good effect.
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Old 09-28-2017, 07:12 PM
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thanks I'll check that out
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