kjalleda

Long story short, I have had this anooooooying P0411 CEL [ secondary air incorrect flow detected ] ever since my AEM V2 install about 8 months ago.

I have pretty much tried everything in the book, also had couple of fellow bay area S2K owners look at the vacuum line routing, air pump, etc. I even followed the 24 step diagnostic procedure as outlined in the service manual, and the only thing at this point that needs to be checked for is a faulty or screwed up ECU.

I am asking out for help as my Smog is due in a few days, and I was hoping if somebody could borrow me their AP1 ECU so that I can install it in my car with your keys attached to mine so it starts and such, and see if the CEL would go away, and if it does then I could either go to the smog station with your CPU and get my car smogged or I could just buy a used CPU and get it re-keyed at the dealer and such.

Thanks in advance guys ...I am located in Mountain View.

-Kishore

still

good luck, i had this problem before.

-outkast-

how did you solve it?

theonlineguy

^^^ bump!

my car threw this code today, pulled it "p0411 secondary air injection incorrect upstream flow detected"
sounds like intake problem...

did some searching, seems like a pretty common code after an intake swap/install/ fi install. it is usually caused by incorrectly/ swapped vacuum lines.

one common fix is to flip the white valve, or check your wiring work.

but why did my car throw my the cel today? i checked all the fittings, and the hoses, everything is new, and tight...
i haven't touched the intake/vacuum lines in a good amount of time.

any help appreciated, i will be asking around tmrw at the meet

na3j nitsuj

Allergies? Jk... Well hope you guys can figure out what's wrong.

dagle

come down to SF, i have an 03' im not using.
i have an extra key, but i don't really want to take out the key lock cylinder unless if you want to do it yourself.

the key has to go through the key-ring reader, which sends matching codes through the ECU to start up. if any of the 3 components do not match in code, it won't work.

i don't think your keycylinder + both our keys + my ECU will work.

itS2Krazy

Yeah kishore,

You need someones ignition too in order to swap ecus. So dagle is correct.

I've seen "still" have this problem before. It was a headache. He swapped ecu's and ignition and the problem was gone. I guess the ecu shorted? I could be wrong.

kjalleda

>>Allergies?
lol

Anyway thanks for the replies dagle and Joey, my S passed smog last week.

The thing with the P0411 is that it first comes up as a pending code on the first cold start, and then into a "MIL on" state only on the second cold start ( cold start means that coolant temp between 32 and 158 F )

So I took advantage of that fact and drove with the pending code after the first cold start for a few miles until the minimum # of OBD2 readiness codes were set to "ready" for CA smog tests [ I have a ODB2 scan tool ] and boom I passed the test ..

-outkast-

sweet!!! congrats kishore!

kjalleda

Thanks Blue !!, I am soooo glad it passed , thanks for your assistance as always