I have a comptech SC and I got a CEL P0411 it says its something about the 2nd air flow sensor detecting bad flow, I don't remember the exact wording. It doesn't seem like a big deal and would be common with superchargers, do any of you guys get this code and is there a way to stop it from comming on?

 

P0411 Secondary Air Injection System Incorrect Flow

I'm guessing thats part of the emissions system? My guess is you have a vacuum line routed wrong or maybe the check valve in the wrong direction? Check over the vacuum lines to make sure you didn't screw something up. That is unless you've had this kit on for awhile and just got the CEL.

 

I double checked the vac lines and they are all connected correctly, the only potential problem I see is that the Y adapter that spilts the one vac cable to the bypass valve on the inlet pipe is very small, is it supposed to be very small. I recently bought the car so I did not do the inital install and I'm not sure exactly what things are supposed to look like. Does anyone have a pic of their Y adapter?

 

man...i just started to get this code as well....it just started happening after i swapped out the vortech bypass valve for an hks one. anyone who knows how to fix this please help.

 

yeah i got that code when i first installed my vortech... the vac lines were crossed.also check to see if your white check valve is on correct.

I saw a pic xviper had,it should be floating around somewhere.do a search for it.
also it's not a big problem it has to do with something about emmisions won't harm your car.

 

My '03 is NA, but I run the Comptech airbox and when I installed a water temperature sensor I was careless and let one of the vacuum lines hang down toward the serpentine belt.

Under acceleration, the g's caused the hose to swing backwards and contact the moving belt which caused a small hole to wear in the hose. When the Vac hose began to leak, I got this same CEL code.


I relaced the hose, zip tied it out of the way, and never saw the problem again.

So my guess is that you have a vacuum leak.

 

I replaced the retartedly small vac hose junction with a new bigger t-connector tonight and drove it around for a while. So far no CEL, so I'm cautiously optimistic. I'm guessing that the super small t-connector was just not letting enough air though.

EDIT

I didn't fix it, I just got the CEL again. It seems to pop up with in 15 seconds after starting the car cold. I am out of ideas... the vac tubes are all hooked up right.