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

Reply
 
LinkBack Thread Tools Display Modes
Old 06-19-2018, 04:06 PM   #1
Registered User
 
Join Date: Apr 2015
Location: Indianapolis
Posts: 40
o2 sensor question - code p0139

2001 Boxster

I had a p0139 error code. o2 sensor bank 1 sensor 2. Also my car hesitates on acceleration. I unplugged the sensor and plugged it back in and messed with a wire a bit. Hesitation got much better and the error code went away. Should I go ahead and replace the o2 sensor of should i investigate for injector leaks before i replace the sensor? Also if I should replace the sensor what is the part #? Before Starter Catalyst, Left or Right) or After Starter Catalyst?

liquidimports84 is offline   Reply With Quote
Old 06-19-2018, 05:07 PM   #2
Lew
So Blessed!
 
Lew's Avatar
 
Join Date: Nov 2016
Location: SE Georgia
Posts: 388
Garage
Quote:
Originally Posted by liquidimports84 View Post
2001 Boxster

I had a p0139 error code. o2 sensor bank 1 sensor 2. Also my car hesitates on acceleration. I unplugged the sensor and plugged it back in and messed with a wire a bit. Hesitation got much better and the error code went away. Should I go ahead and replace the o2 sensor of should i investigate for injector leaks before i replace the sensor? Also if I should replace the sensor what is the part #? Before Starter Catalyst, Left or Right) or After Starter Catalyst?
PO139 code is an aging (dying) sensor. Don't understand why it would effect your cars hesitation on acceleration. The 02 sensor monitors the efficiency of the cat. Clear the code and do a spirited drive....and then check for the code again. Might go away and not come back.
__________________
Artic Silver Boxster S - Black Leather - Black Top - Convience Plus Package
Lew is offline   Reply With Quote
Old 06-19-2018, 05:19 PM   #3
Registered User
 
Join Date: Apr 2015
Location: Indianapolis
Posts: 40
Quote:
Originally Posted by Lew View Post
PO139 code is an aging (dying) sensor. Don't understand why it would effect your cars hesitation on acceleration. The 02 sensor monitors the efficiency of the cat. Clear the code and do a spirited drive....and then check for the code again. Might go away and not come back.
The engine light went away after i messed with o2 sensor. Still i have some hesitation when accelerating

According to https://www.yourmechanic.com/article/p0139-obd-ii-trouble-code-o2-sensor-circuit-slow-response-bank-1-sensor-2

What are the symptoms of the P0139 code?

The engine may stall or run rough on deceleration if excessive fuel is getting in the engine.

The Check Engine Light will come on.

The engine may hesitate upon acceleration after a deceleration phase.
liquidimports84 is offline   Reply With Quote
Old 06-19-2018, 05:31 PM   #4
Custom User Title Here
 
particlewave's Avatar
 
Join Date: Mar 2012
Location: WA
Posts: 6,087
Garage
As you posted, that code is for the post cat o2 sensor. The post cat sensors will not affect how the car runs. Period.
They only monitor the condition of the catalytic converter.

Your hesitation is completely unrelated.

particlewave 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 04:55 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