Anyone have any ideas to why im getting a random P0411 every 2 weeks or so? I've looked under the car during a cold start, and hear the usual SAI pump sound, and everything looks in place. The code happens after I've driven for a bit and the car runs fine just as usual. Any ideas? trying to avoid the stealership in this one (they will get me for my t-belt trans flush and axle though )

 

Check your SAI connections to see if there is a leak. I had the same code and I found a tear in one of the SAI connections.

 

Yeah, check the line that comes directly from the SAP and all your vacuum lines. Also check and see if the egr valve is functioning properly.

 

+1 to the above. Also try giving the relay a resetting. To the best of my knowledge, all this involves is taking it out, giving it a shake, and plugging it back in. Sounds like it might be sticking, which is notorious with said cheaply made relay. Worst case, buy a new relay if resetting it doesn't seem to help and everything else looks good.

 

So I drove to school today, light was on, left to get my haircut at the mall after school was on, still there, left the mall and noticed that it had disappeared. Any ideas on what happened?
This has come on twice before, (once for 2 days and once for a week and a half) both times I cleared them manually with a battery pull. This has been 6 days since the code appeared.

 

It most likely means the problem isn't a hard fix. It probably went off because whatever the "problem" is is correcting itself automatically and causing everything to read properly again and the light to go off. In this case, I'm still betting on the relay because it sticks open- or closed- and causes the pump to either run, or not run at the wrong times which flashes the ECU that there is an incorrect secondary upstream air flow. Once it unsticks and starts working properly again, everything reads as it should and the CEL goes away so definitely look into that relay and see if that fixes the problem.

 

Ok, ill look at that tomorrow morning. Where is it?

 

Its inside the ECU box. Its right on the drivers side in the back corner, black box, cant miss it. Just undo the screws holding the cover on and inside you'll see the ECU and right next to it a small, light gray cube that's the relay. Just unplug it, give it a couple good shakes and plug it back in, replace the screws and see if it takes care of the problem. If it appears to still be acting up after a week or two, try just buying a new relay. You will probably have to go to the dealer for it though, I had this same problem and didn't have much luck finding a replacement relay on any of the usual parts websites (ECS, purems, etc) and ended up just getting it from the dealer, was a little over $30.00

 

FIXED IT

I know this may seem weird, but it was because that pre filter after the intake duct was full of debris from 135k of driving. It was almost completely clogged so the car was suffocating. Cleaned it with a vacuum, reset the ecu with a battery pull and its like a new car! My mpgs doubled almost, and it pulls like hell

 

That's good you cleaned that out but I don't think that will solve your problem. Until you check out all the suggestions we gave you, I bet you that code will still come back