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Discussion Starter #1 (Edited)
Hey brains trust,

I need your help please! I'll try to keep this short...

I have 2008 and it was running fine. A little while ago the Secondary Air Pump made that screeching sound telling me it was dying. It made the sound one more time then died; no Check Engine Light. A few weeks later, I got a CEL and when I connected the OBD2 it gave me the famous P0410.

So I bought a Secondary Air Pump (eBay) and replaced it. To be doubly sure, I bought a Secondary Air Injection Valve (eBay) and replaced that too. I've been driving it for about 100 miles and no CEL; great! However, I need to perform the Driving Cycle since I've got emissions coming and I'm still showing the Fail (red 'X') for 'Cat' and for 'Air'.

So today I went for another drive trying to get rid of these 2 failures. After about 40mins of driving I connect the OBD2 and I get a Pending Code ... P0410. The CEL did not come on, but it will next time it fails again.

Question: What the bloody hell else could be causing this P0410 given I replaced most of the Secondary Air parts?

I must admit I don't hear the Pump going when I turn on the car, but not sure if I should hear it given it's new and maybe really quiet...?

Edit: I thought it could be the EGR given the old Secondary Air Pump had water in it, but the OBD2 indicates the EGR is fine.

Any help appreciated because my Emissions deadline is coming and I'm genuinely a bit lost.

Thanks!
 

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There is a temperature range for the air pump. If you are outside the limits (too cold or too warm) the pump doesn't come on. :)
 

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There is a temperature range for the air pump. If you are outside the limits (too cold or too warm) the pump doesn't come on. :)
Are you sure about this? I replaced my secondary air pump 1 1/2 years ago for my emission test and every morning for the first start between 38 an 115 degree fahrenheit
it goes on. It is true after the first start it goes not on every time and looks like it is regulated by some temperature range.
 

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I must admit I don't hear the Pump going when I turn on the car, but not sure if I should hear it given it's new and maybe really quiet...?

Thanks!
LOL - secondary air pump and quiet... It is louder than my muffler. You will definitely will hear it when it runs. Did you check the 50 amp fuse
in the battery compartment for the secondary air pump? When I changed out my one the fuse was blown as well.
 

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Are you sure about this? I replaced my secondary air pump 1 1/2 years ago for my emission test and every morning for the first start between 38 an 115 degree fahrenheit
it goes on. It is true after the first start it goes not on every time and looks like it is regulated by some temperature range.
From the Intro to Service Manual:
The duration of secondary air injection is dependent
on the coolant temperature.
The secondary air injection pump is only actuated at a
coolant temperature of 45 °F to 97 °F (7 °C to 36 °C)
and for a maximum duration of 33 seconds
:)
 

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Discussion Starter #6
LOL - secondary air pump and quiet... It is louder than my muffler. You will definitely will hear it when it runs. Did you check the 50 amp fuse
in the battery compartment for the secondary air pump? When I changed out my one the fuse was blown as well.
You, Sir....

are a freakin' LEGEND! Thank you!!

I had checked the Service Manual (obviously not well enough) and could not find a fuse location for the Secondary Air Pump. So I just stopped looking.

Without your little note, I never would have looked near the battery.

Again - THANK YOU VERY MUCH!!

And thanks to the other guys providing answers. You all rock!
 

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Hey brains trust,

I need your help please! I'll try to keep this short...

I have 2008 and it was running fine. A little while ago the Secondary Air Pump made that screeching sound telling me it was dying. It made the sound one more time then died; no Check Engine Light. A few weeks later, I got a CEL and when I connected the OBD2 it gave me the famous P0410.

So I bought a Secondary Air Pump (eBay) and replaced it. To be doubly sure, I bought a Secondary Air Injection Valve (eBay) and replaced that too. I've been driving it for about 100 miles and no CEL; great! However, I need to perform the Driving Cycle since I've got emissions coming and I'm still showing the Fail (red 'X') for 'Cat' and for 'Air'.

So today I went for another drive trying to get rid of these 2 failures. After about 40mins of driving I connect the OBD2 and I get a Pending Code ... P0410. The CEL did not come on, but it will next time it fails again.

Question: What the bloody hell else could be causing this P0410 given I replaced most of the Secondary Air parts?

I must admit I don't hear the Pump going when I turn on the car, but not sure if I should hear it given it's new and maybe really quiet...?

Edit: I thought it could be the EGR given the old Secondary Air Pump had water in it, but the OBD2 indicates the EGR is fine.

Any help appreciated because my Emissions deadline is coming and I'm genuinely a bit lost.

Thanks!
Check the fuse that is located inside the battery box located under the floor on the passenger side. I had the same symptoms and I changed all the components you mentioned. I researched the issue and came up with the blown fuse. R&R the fuse and problem solved. Good luck.
 

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2008 75000miles a check eng light seems air pump froze and blew the fuse my repair place could not source the parts from their supply line so I sourced the needed parts on line from various sites so far the parts will be about $100 but the labor quote from mech is $500 seems that it is in a tough spot to get to as I have found from searches on line could be time to sell the car last year- front suspension arms -alternator- clutch actuator and now air pump
 
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