Hey,
I had recently put a Short Ram intake in my S2000 and it was fine that the CEL came on and i ran it and it was P0411 which is 2nd injection system incorrect airflow. I put the oem airbox and cleared code and it was fine for a few days but now the code is back. What is this code and what could it be? Any info would be appreciated thanx peace

 

https://www.s2ki.com/forums/index.php?showtopic=105368

 

seen that bro i dont have any lines mis matched or cut up they were never touched... thats why i am posting thanx peace

 

Check them again. Biggest cause of this code is misrouted vacuum lines, or lines not connected.

 

all the hoses are connected they are not routed as they were stock but i dont see how that could do anything. ill put em neatly back the way they were if that will do it. also what does this effect when the cel is on? gas mileage? performance?

 

have you checked your check valve? you might have flipped it when you were working on it. because that's what i did and i had to live with p0411 for about 3 months. also if you think all the wiring is correct check the secondary air injector, it's on the driver side front all you gotta do is take off the front bumper. GL

 

It has to do with emissions.it won't "hurt" your car.