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Old 11-25-2004, 10:25 AM   #1
sly_h
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Default Secondary Air Injection System Malfunction

Hi All,
I was wondering if any of you have ran into this,
I have a 99 SL3 and I keep getting code P0410 Secondary Air Injection System Malfunction
Do you know what it is and how I can remedy it?
Thanks,
sly
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Old 11-25-2004, 11:40 PM   #2
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Default Re: Secondary Air Injection System Malfunction

Welcome to the Board.

What is setting the code is that the O2 sensor is not seeing a lean condition when the air pump is running. Maybe more specificly when the air pump is suposed to be running.
to diagnose you need a tech 2 scan tool to run a special test. Best that you can do with out is to check that the air pump is working, usually kicks in on start up, and that all the electrical and vacuum connections are good.
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Old 11-25-2004, 11:43 PM   #3
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Default Re: Secondary Air Injection System Malfunction

The "secondary air injection system" is a small electrically operated air pump that is plumbed into the exhaust manifold. Under a signal from the PCM the "pump" comes on an injects air into the exhaust manifold. The PCM looks for an increase in O2 at the O2 sensor as an indicator that the pump came on when commanded. If the pump does not come on.... Possible causes:

Bad pump
Obstructed or disconnected pump to manifold air supply tube
Bad or disconnected wiring to pump
Failing FRONT O2 sensor
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Old 11-26-2004, 10:53 PM   #4
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Default Re: Secondary Air Injection System Malfunction

Quote:
Originally Posted by sly_h
Hi All,
I was wondering if any of you have ran into this,
I have a 99 SL3 and I keep getting code P0410 Secondary Air Injection System Malfunction
Do you know what it is and how I can remedy it?
Thanks,
sly
Here is a site that explains secondary air injection, if you are interested in what it does...

http://www.12v.org/engine/index.php?section=hw&sm=2nd
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Old 11-28-2004, 08:59 PM   #5
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Default Re: Secondary Air Injection System Malfunction

Thanks!
sly
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