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Discussion Starter #1
I had the head machined, because there was a leak where it was warped. I got it back from the shop and drove it less than 25 miles and the SES light comes on. I went to auto zone had the code pulled. It came up P0411- Secondary Air Inject System Incorrect Flow Detected, Also it has a slight vibration. This is far i got. I'm wondering if a hose is lose or something or didn't tighten something down properly. Or if its something worse like the air pump going out?

Thanks in Advance
CJ
 

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Discussion Starter #2
I was reading that vacuum hoses would cause a surge in idle speed, I don't have any idle surging it just sits at around 800 rpms. So could it a disconnected hose?

CJ
 

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Discussion Starter #3
:bump:


Symptoms:
Poor Gas Mileage 16 MPG- 50% City, 48% Highway, 2% Idling
Vibrating at Idle, No other RPM level
P0411 Code.

I have no idea what the cause is
Any ideas where to look?

CJ
 
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