Codes P0410 & P1411 related to bad AOS?

[blue62]

Originally Posted by mungodrums

My 99 Boxter was delivered to me three days ago. Occasionally on start up a billow of smoke would come out of tail pipes. I thought bad AOS. Today check engine light came on, dammit. Went to Autozone the following codes came up: P0410 and P1411. Can these two codes be triggered by faulty / bad AOS / oil separator, think this is the same part, correct? Faulty gas cap? While car was idling, I removed oil cap and it was somewhat challenging to get off, felt quite a bit of vacuum. What do you guys think. Don't want to randomly put in new parts. Smoke test most efficient way to determine leak or issues? Very bummed out. Ger.

P0410=Secondary air injection system cyl. 1-3 signal implausible/implausible operating range/malfunction.
P1411= same thing on cyl. 4-6
I would start by checking to see if there is a related fuse that is blown.
Then find a wiring diagram to the SAI and check the wiring
Then test the SAI pump.

The AOS and other issues you mentioned are unrelated to the current codes.

How many miles on the car?
Has any recent work been done on it?

[78F350]

Those two codes are often caused by a vacuum leak - broken or disconnected hose for the secondary air injection system (SAI). There are plenty of threads here on the forum about the vacuum hoses.

The AOS could still be a problem, but would not likely be related to those codes as Blue said.

Generally the SAI system is only emissions related and helps to give a more complete combustion of fuel when your car is first started. If the failure is related to a vacuum leak that can cause your car to run poorly and should be fixed.

[blue62]

To further my first reply:
When talking about the SAI= think smog pump.

An air pump kicks on for a short period of time when you first start the car.
Some people say they an hear it kick on and turn off.

I always go with the simplest things first and work my way up the diagnostic tree.
So first find out if the pump is working or not.
If it isn't then look to fuses and relays first.
wiring issue second.
bad pump third.

If the pump is working then look for vacuum leaks in the SAI related system first.
Then issues with the related electric and vacuum operated components.

Do a search on SAI related issues here on the forum there is lots of information.
There are pictures and diagrams of the system layout.
Get familiar with the system, its purpose, and how it functions.
Understanding the system will help with correcting issues with it.