Troubleshooting P0411 (OBDII)

[tech.henderson]

I found out that my NB has a check engine light on, so I took it to Autozone to have it scanned. It came back with the following...

P0411

The PCM has determined that the flow detected in the secondary air injection system is incorrect for the current engine operating conditions.

So now I ask what that all deciphers to. Is it a sensor malfunction? Or something that I can take to the Dealer and have them cover under a powertrain warranty? Basically I need to know what it is about and how bad it can be.

Thanks in advance

[Oyveychris]

I know everybody is gonna flame me on this, but here goes...I think you should unhook your battery (negative terminal) for about 15 minutes. This will clear the code. Then see if it comes back. Your car has low miles and shouldn't be throwing a code, so maybe it's a fluke. The other thing would be to check to see if you have a loose or leaking vacuum hose. Also, don't you have some recourse with the dealership? You just purchased this a few days ago if I remember correctly. I would be down there raising quite a stink and demand they fix it. Just my 2 cents. Good luck.

[Toad]

for hte 2.0, 99% of the time for P0411 is a vaccum home. I goes from a solenoid (the bottom vacuum hose) behind the airbox to a valve on the back of the intake manifold on the 2.0. I know, i did it and other people told me this exact same thing when i asked. i'm not rally sure where it is on the 1.8, but it's most likey the same vaccum line.