CEL P0410 after AOS replacement...Connected ?

[jim_hoyland]

I just had my indy replace the AOS and two days later the CEL P0410 appears, it says Secondary Air Injection problem on my OBDC diagnostic.

Is there something about the AOS replacement that is related to getting this CEL ?

[newBgeek]

Originally Posted by jim_hoyland

I just had my indy replace the AOS and two days later the CEL P0410 appears, it says Secondary Air Injection problem on my OBDC diagnostic.

Is there something about the AOS replacement that is related to getting this CEL ?

It's possible that a vacuum line got disconnected. The same thing happened to me when I replaced my power steering pump. In my case, the tiny check valve attached to one of the rubber sleeves came off. Surprisingly, didn't affect drivability but did set the air injection code every 2nd or 3rd time I started the car after resetting the code.

[jim_hoyland]

Just picked the car up. It was a three way hose connector. It was brittle, broken, and the hose fell away. CELs gone bye-bye.

It's interesting that this is fairly common after replacing the AOS.

[newBgeek]

Originally Posted by jim_hoyland

Just picked the car up. It was a three way hose connector. It was brittle, broken, and the hose fell away. CELs gone bye-bye.

It's interesting that this is fairly common after replacing the AOS.

There is a vacuum line that runs across the engine and acts like a trip-wire. It's easy to trip over when you're yanking something out of the engine. I must have tripped over it while yanking out my power steering pump. The vacuum line is connected to the t-connector. The other 2 connections are fairly short. When you trip over it, something is going to give. In my case it was the check-valve which is also connected to the T. In your case, the T itself broke.

This is one of the reasons I like to work on my own cars. So when there is a screw-up, I know who to blame!