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

Reply
 
LinkBack Thread Tools Display Modes
Old 05-19-2018, 05:14 PM   #1
Registered User
 
Join Date: May 2016
Location: GTA
Posts: 125
New codes up P1128 P0446

Evap emissions systems Vent control?

could this be overfilling the gas tank or possibly the fuel cap?

P1128 Oxygen Sensor.
How hard is this to change?

Fuzzuki is offline   Reply With Quote
Old 05-20-2018, 10:22 AM   #2
Registered User
 
Join Date: Aug 2005
Location: Sanford NC
Posts: 2,448
The O2 sensor can be changed by any exhaust shop in about 15 minutes if you bring the part. Most of the time is waiting for the exhaust system to cool down. Takes a special tool.

Don't buy generic ones or ones without crimped on at the factory pigtails.

Bosch makes the parts for Porsche and they can be had for less without the Porsche label stenciled on. I used two Bosch. More info including part numbers here.
mikefocke is online now   Reply With Quote
Old 05-20-2018, 08:31 PM   #3
Registered User
 
Join Date: May 2016
Location: GTA
Posts: 125
Thank you appreciate it
Fuzzuki is offline   Reply With Quote
Old 05-22-2018, 12:17 PM   #4
Registered User
 
Rickvd's Avatar
 
Join Date: Mar 2018
Location: Indiana
Posts: 125
Garage
Thanks for the Link - Nice info to bookmark - Rick
Rickvd is offline   Reply With Quote
Old 05-23-2018, 02:47 AM   #5
Beginner
 
Jamesp's Avatar
 
Join Date: Mar 2013
Location: Houston
Posts: 1,659
Garage
P0446 is evap canister shutoff valve (function) below limit. Possible causes purge air line blocked
Evap canister purge valve stuck in open position
Evap canister shutoff valve stuck in open position or blocked
Flow in evap canister too high (filter deformed blocked)
Pressure sensor connected incorrectly (polarity reversed)
__________________
2003 S manual

Last edited by Jamesp; 05-23-2018 at 12:40 PM.
Jamesp is offline   Reply With Quote
Old 05-23-2018, 12:49 PM   #6
Beginner
 
Jamesp's Avatar
 
Join Date: Mar 2013
Location: Houston
Posts: 1,659
Garage
P1128 360 Oxygen Sensing Adaptation, Idle Range, Bank 1- below limit
Possible fault causes
incorrect signal from the MAF sensor
fuel pressure too high
fuel injector leaking
EVAP cannister Purge valve open

Check signal from MAF sensor
Check fuel pressure
check fuel pressure regulator, vacuum connection and fuel return line
Check EVAP cannister Purge valve
Check fuel injectors for leaks

As you have both the P0466 and the P1128, and both of these codes appear with the EVAP cannister purge valve open, first thing I'd do is go take a look at that valve.

Replacing an O2 sensor is not even in the troubleshooting, so I'd stay away from that.

__________________
2003 S manual
Jamesp 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 12:05 PM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2021, 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