Notices
Boxster & Boxster S (986) Forum
Sponsored by:
Sponsored by:

Secondary Air Injection "Incomplete"

 
Old 08-15-2018, 03:10 AM
  #1  
doridori
User
Thread Starter
 
doridori's Avatar
 
Join Date: Oct 2005
Location: Los Angeles, CA
Posts: 199
Question Secondary Air Injection "Incomplete"

I have a 2002 Boxster (non S).

When I do the ODB II scan, it keeps saying that the Secondary Air Injection is "Incomplete".

What can I do to make the Secondary Air Injection to be "complete" or "ready"?

Thanks
doridori is offline  
Old 08-15-2018, 04:45 PM
  #2  
tone40
User
 
tone40's Avatar
 
Join Date: Apr 2006
Location: Whittier, CA
Posts: 299
Default I am having the same problem.

Mine is an '00 S. I previously had CEL 0133 and 1275 and cleared the codes (after replacing all 4 O2 sensors). I have run the drive cycle and reset the ECU a few times. Still have secondary air non-readiness along with catalyst. A local smog tech suggested that the air pump check valve may be the culprit. But, I am not just ready to start throwing parts at the issue.

Let me know how you solve it.
tone40 is offline  
Old 08-17-2018, 12:02 PM
  #3  
Anker
User
 
Join Date: Nov 2016
Posts: 169
Default

I believe you have to drive a couple hundred miles after the CEL clears before the SAI goes complete. My understanding that this is done to ensure that you can't clear the CEL and then drive right over to the inspection station. The problem has to be really solved.
Anker is offline  
Old 08-17-2018, 02:47 PM
  #4  
NuttyProfessor
User
 
NuttyProfessor's Avatar
 
Join Date: Aug 2018
Posts: 1,199
Default

Originally Posted by doridori View Post
I have a 2002 Boxster (non S).

When I do the ODB II scan, it keeps saying that the Secondary Air Injection is "Incomplete".

What can I do to make the Secondary Air Injection to be "complete" or "ready"?

Thanks
Curious, was there anything done to the engine before the MIL?
NuttyProfessor is offline  
Old 08-18-2018, 01:27 PM
  #5  
Macster
Addict
Rennlist Member
 
Join Date: Sep 2006
Location: Livermore, CA
Posts: 17,899
Default

Originally Posted by doridori View Post
I have a 2002 Boxster (non S).

When I do the ODB II scan, it keeps saying that the Secondary Air Injection is "Incomplete".

What can I do to make the Secondary Air Injection to be "complete" or "ready"?

Thanks
You have to drive the car.

Much has been written on some pretty involved OBD2 drive cycles. With my 2002 Boxster (and my 2003 996 Turbo) I found all readiness monitors would be set to complete at some point during my 30 mile drive to work. I doubt the entire 30 mile drive was necessary but that is my most common usage of my cars.

Briefly, my commute started with a cold engine start with enough idle time to let the secondary air injection pump shut off. Concurrent with this the fast cold idle speed dropped to near normal hot idle. This was when the DME switched from open loop mode to closed loop mode.

Then from less than a mile to a couple of miles -- depending upon how congested the freeway was at where I would normally get on the freeway -- on surface streets followed by a number of miles on the freeway. The end of my commute was pretty much like the start. From less than a mile to a couple of miles on surface streets until I reached the office.

I did not drive the car any real special way. Of course I kept RPMs low (<4K) while the engine was cold. After it was warmed up I occasionally exceeded 4K RPMs but it was not my commuting style to thrash the car or the engine. When trying to get the readiness monitors to complete hard acceleration, high RPMs, can work to delay this process.

If all the readiness sensors do not get set to complete in the above "drive cycle" almost certainly there is a problem and it is not due to the drive cycle being inadequate. There may not be a CEL with an error code logged. It can take the DME a while to finally throw in the towel so to speak and register an error code. This can be delayed, as I touched upon above, by how the car is driving during the "drive cycle".

In those cases where owners report following a much longer drive cycle or one that has "precise" call outs for idle time, cruising time, etc., and meeting with success I suspect the drive cycle was successful because the problem was intermittent enough that the DME managed to get all the readiness monitor tests complete. Over the years I have encountered several problems that were intermittent in nature and quickly learned how to drive the car to avoid triggering the CEL and managing to get all the readiness monitors set to complete in order to pass a smog check.
Macster is offline  
Old 08-19-2018, 02:57 AM
  #6  
Lapister
New User
 
Join Date: Aug 2018
Posts: 1
Default

I read this on another forum and thought it was too good to be true. If all other readiness codes are complete except SAI try this. On a cold start rev engine at 2700 rpm for the entire 90 sec while parked. I did it in my garage several times. I had nothing to loose as this problem plaqued me for a long time. Saw it go ready on my cheapy scanner right there on my 02 Box.
Lapister is offline  
Old 08-22-2018, 12:20 PM
  #7  
tone40
User
 
tone40's Avatar
 
Join Date: Apr 2006
Location: Whittier, CA
Posts: 299
Default Drove ~350 miles and the catalyst exception cleared...

But, not the SA. Tried the 2700 rpm suggestion at cold start up and it cleared (after a short low idle)! Thank you. I have been dealing with this for many months.

Last edited by tone40; 08-22-2018 at 05:55 PM. Reason: Grammar
tone40 is offline  
Old 08-26-2018, 01:57 PM
  #8  
Macster
Addict
Rennlist Member
 
Join Date: Sep 2006
Location: Livermore, CA
Posts: 17,899
Default

Nice trick that and glad it worked for you. Never had to do that -- even if I had known about it -- as my normal work commute/drive cycle has the engine running real close to the 2700/3K RPMs range most of the time when I'm not accelerating from a stop or slowing for a stop. Guess for me this was the equivalent.
Macster is offline  

Thread Tools
Search this Thread

Contact Us - About Us - Advertising - Cookie Policy - Privacy Statement - Terms of Service

© 2019 MH Sub I, LLC dba Internet Brands

We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.
 
  • Ask a Question
    Get answers from community experts
Question Title:
Description:
Your question will be posted in: