Need to temporarily borrow AP1 ECU to test a CEL
#1
Thread Starter
Need to temporarily borrow AP1 ECU to test a CEL
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
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
#4
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^^^ 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
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
#6
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.
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.
#7
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.
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.
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#8
Thread Starter
>>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 ..
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 ..