engine code P0411
 

secondary air injection system incorrect flow detected. that is what the code reads according to my accessport. ive tried looking for some threads on this issue but can't find anything. car has rough idle once its fully warmed up and i have been driving around for a while. also i noticed a loss in power. any help attaching threads for me to look at, or possible answer to this problem will be much appreciated! for mods i have basic calibrations for my cobb accessport, full exhaust and a cold air downpipe.

describe "full exhaust"

Here is a thread related to the code, but I'm not sure if it relates with your issue https://www.rx8club.com/showthread.p...P0411&t=116640

[QUOTE=RX8Soldier;4135687]describe "full exhaust"

header, straight piped

NO cat could be causing that if you have the O2 sensor codes shut off in the calibration

If you are running an accesspôrt tune just shut the error code off...it isn`t anything but an emissions code

i am going to try that but it still doesnt explain power loss. i am going to take a look at the header and see what i need to do, thing is that i had the exhaust for a year before getting this code.

I'm having somewhat the same problem, what ended up happening or being wrong in this case?

P0411
 

Just an FYI:
Had the exact same code. Turned out to be clogged up catalytic convertor. After checking it and and seeing the broken honeycombs, I bought a Walker cat from Autozone for ~$230 and car revs to 9000 quickly, again and has full power.
CEL went off later that same day by itself.

Code P0411
 

Today I went to turn on my 8 and my CEL came on and got the code p0411 I recently noticed some hesitation when pressing on the throttle going from a complete stop I don't think it can be the cat since I just replace it like 2 months ago I really hope someone can help I don't really know what to do

There are plenty of threads to check out. It's usually emissions related issue. More info is needed though to properly assist you. Year of car? Any mods? Maintenance history?
Try clicking this for more self troubleshooting

its an 06 i just got it about 4 months ago so i haven't done anything to it it did come with an aftermarket intake the cat went bad and got replaced it like a month or so ago

hate to revive an almost decade old thread, but what was the solution? I’ve been decatted for 4 years with no issue on this code until now. Can’t go over 3k rpm’s, if it’s just emissions, it’s probably just a symptom of a bigger problem, but thought I’d ask to see your solution here.

3k limp mode is the OMP or the coolant temp sensor. 99% of the time it's the OMP connection or the OMP incorrectly installed. It will throw a code but not all readers can read it.