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

Reply
 
LinkBack Thread Tools Display Modes
Old 08-26-2015, 04:00 AM   #1
X GI
 
SJEFFB986's Avatar
 
Join Date: Nov 2014
Location: Pa
Posts: 80
Pesky check engine light!!

More codes... p1128 and p1130. Just did an oil change. Researched and found out if the filler cap is not tight these codes appear and will trip the light! So be careful when doing an oil change. Clean the gasket, tighten the cap well my friends....
1999 Boxster base with 128k miles.

__________________
Daily Drivers:
2013 Passat SE
2001 RX300
1999 Boxster
SJEFFB986 is offline   Reply With Quote
Old 08-26-2015, 07:55 AM   #2
Registered User
 
Join Date: Jul 2004
Location: Houston, Texas
Posts: 7,236
Well, that's a new-to-me reason those codes throw a CE light!

These are oxygen sensor codes. Sometimes, the MAF is fouled or going out and the computer won't tell you it's going out but will tell you something is awry with the O2 sensors. Or, an O2 sensor has gone out and it will tell you the MAF is bad.

When it comes to emissions, the diagnostic codes on Porsches are not that accurate in my opinion.

If you know your Boxster has never had all four O2 sensors replaced, it's a smart thing to budget for and do sooner than later. When I replaced mine after 90k miles (all four mind you) I got a lot more power and far better fuel economy. You don't want to replace just one or one bank...
__________________
'97 Boxster (Black Hole for 42,000 Dead Presidents and counting) - 122k
New motor, transmission, suspension, and on and on and on it goes...
RandallNeighbour is offline   Reply With Quote
Old 08-26-2015, 09:34 AM   #3
Registered User
 
Join Date: Feb 2005
Location: It's a kind of magic.....
Posts: 5,160
Quote:
Originally Posted by RandallNeighbour View Post
When it comes to emissions, the diagnostic codes on Porsches are not that accurate in my opinion.
Not really. In the factory OBD II diagnostics manual, the first item listed under these codes are a vacuum leak, which was exactly what he had.
__________________
Anything really new is invented only in one’s youth. Later, one becomes more experienced, more famous – and more stupid.” - Albert Einstein
JFP in PA is offline   Reply With Quote
Old 08-26-2015, 03:12 PM   #4
Registered User
 
lkchris's Avatar
 
Join Date: Jan 2014
Location: Albuquerque, NM, USA
Posts: 656
Well, generically speaking it's a "gasket," but technically it's an o-ring and you can inexpensively replace it separately. It's by design not a matter of tighten tighter, as you just turn the cap until it hits the stop..

While you're at it, replace the o-ring on the dipstick, too ... 'cause it's the same vacuum leak.
__________________
Kent Christensen
Albuquerque
2001 Boxster
2007 GL320 CDI, 2010 CL550
3 BMW motorcycles

Last edited by lkchris; 08-26-2015 at 03:16 PM.
lkchris is offline   Reply With Quote
Old 08-26-2015, 06:15 PM   #5
Registered User
 
Join Date: Jul 2004
Location: Houston, Texas
Posts: 7,236
JFP, I guess I need to update my error code list!

Or what I should have said was that I have had codes produced for a failing MAF and it was a failing O2 sensor in reality.
__________________
'97 Boxster (Black Hole for 42,000 Dead Presidents and counting) - 122k
New motor, transmission, suspension, and on and on and on it goes...
RandallNeighbour is offline   Reply With Quote
Old 08-27-2015, 03:16 AM   #6
Registered User
 
Join Date: Feb 2005
Location: It's a kind of magic.....
Posts: 5,160
Quote:
Originally Posted by RandallNeighbour View Post
JFP, I guess I need to update my error code list!

Or what I should have said was that I have had codes produced for a failing MAF and it was a failing O2 sensor in reality.
There are multiple things that can tip the codes, a vacuum leak is the most common and probably why they listed it first.

__________________
Anything really new is invented only in one’s youth. Later, one becomes more experienced, more famous – and more stupid.” - Albert Einstein
JFP in PA 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 01:51 AM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2019, 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