Go Back   986 Forum - for Porsche Boxster & Cayman Owners > Porsche Boxster & Cayman Forums > Boxster General Discussions

Reply
 
LinkBack Thread Tools Display Modes
Old 09-08-2008, 06:30 AM   #1
Registered User
 
Join Date: Oct 2007
Location: Dallas, TX
Posts: 295
Send a message via Yahoo to TimAustinW
CEL - P1411 Secondary Air Injection System

I got a CEL this morning and my OBD is telling me it's a P1411 - the Bentley Manual gives two possible causes...

- Signal implausible/ implausible operating range / malfunction
- Short to Ground / below lower limit / lean mixture threshold


Can someone shed a little more light on this?

One thing to note, and I'm not sure if it means anything but this morning it was raining, the first time in several weeks. Also I just recently replace my MAF, not sure if that's related.

__________________
TimAustinW
http://i226.photobucket.com/albums/d...ignature-1.jpg
02 Seal Grey, NHP Headers w/ Highflow Cats/2ndary Bypass Pipes, smoked side markers/3rd brake light, exterior match interior trim, 986 Lloyds Mats, 986 deck lid emblem, arctic silver intake grills, ipod link, painted calipers, Glass Window Robbins Top with defroster kit, Bose Sound System, Leather lower door panels, Console Lid w embroidered crest; Stainless door sills; Painted Bumperettes; Custom Hood Crest
TimAustinW is offline   Reply With Quote
Old 09-08-2008, 10:27 AM   #2
Registered User
 
Lil bastard's Avatar
 
Join Date: Feb 2008
Location: Du Monde
Posts: 2,199
The Motronic 7.2 DME Diagnostics manual lists a number of possible causes for P1411 - Secondary air injection system, bank 2.
  • A bad secondary air injection pump

    restricted air supply lines

    electronic changeover valve not functioning

    air changeover valve not functioning

    vacuum leaks

    wiring harness

    relay

    DME control module

It also calls for a testing procedure using the PIWIS or PST2 tester and calls for specific air temperature and air mass values.

I suspect that since it's isolated to Bank 2, it's probably vacuum leaks or the MAF, at least that's where I'd start. The other causes call for replacement of components and need the tester to isolate them.
__________________
1990 Porsche 964 Carrera 4 Cabriolet
1976 BMW 2002
1990 BMW 325is
1999 Porsche Boxster
(gone, but not forgotten)
http://i933.photobucket.com/albums/a...smiley-003.gif

Never drive faster than your Guardian Angel can fly!
Lil bastard is offline   Reply With Quote
Old 09-08-2008, 11:24 AM   #3
Registered User
 
Join Date: Oct 2007
Location: Dallas, TX
Posts: 295
Send a message via Yahoo to TimAustinW
So that raises a question. I just had the MAF replaced in July. Later on when looking at the receipt they had my car listed as an S model which it is not. Is the MAF sensor different on an S than it is on the base Boxster? Could it be they installed the wrong MAF?

__________________
TimAustinW
http://i226.photobucket.com/albums/d...ignature-1.jpg
02 Seal Grey, NHP Headers w/ Highflow Cats/2ndary Bypass Pipes, smoked side markers/3rd brake light, exterior match interior trim, 986 Lloyds Mats, 986 deck lid emblem, arctic silver intake grills, ipod link, painted calipers, Glass Window Robbins Top with defroster kit, Bose Sound System, Leather lower door panels, Console Lid w embroidered crest; Stainless door sills; Painted Bumperettes; Custom Hood Crest
TimAustinW is offline   Reply With Quote
Reply


Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On
Trackbacks are On
Pingbacks are On
Refbacks are On




All times are GMT -8. The time now is 04:41 AM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2020, vBulletin Solutions, Inc.
Content Relevant URLs by vBSEO 3.6.0
Copyright 2018 Pelican Parts, LLC - Posts may be archived for display on the Pelican Parts Website -    DMCA Registered Agent Contact Page