Welcome to Bimmerfest -- The #1 Online Community for BMW related information! Please enjoy the discussion forums below and share your experiences with the 200,000 current, new and past BMW owners. The forums are broken out by car model and into other special interest sections such as BMW European Delivery and a special forum to voice your questions to the many BMW dealers on the site to assist our members!

Please follow the links below to help get you started!

Go Back   Bimmerfest - BMW Forums > BMW Model Discussions > 3 Series / 4 Series > E36 (1991 - 1999)

E36 (1991 - 1999)
The E36 chassis 3-Series BMW was a huge hit among driving enthusiasts from the first moment the car hit the pavement. The E36 won numerous awards over the years it was produced and is still a favorite of many BMW enthusiasts to this day! -- View the E36 Wiki

Reply
 
Thread Tools Display Modes
  #1  
Old 08-30-2012, 04:44 PM
rkrug rkrug is offline
Registered User
Location: new york
 
Join Date: Oct 2007
Posts: 20
Mein Auto: 318 ic
oxygen sensor harness routing .. where does it go ??

Hello, I just got a 98 318ti .. neat car ... Downside is the check engine light was on . I replaced the rear 02 sensor and the light didnt go away . I was getting codes that said the o2 heater was not working ... po136 p1186 p0420 checked the wire that power the heater on the harness and no voltage .. (should be 12v)

I put my scan tool on it and the 02 voltage was betewwn .4 and .43 v .. lots of spikes , not flowing as a normal downstream 02 sensor . I then disconnected the sensor from the harness and the spikes stayed the same , so it is obvious the sensor is not being read . Not sure what is making the spikes ..

Where does the post 02 sensor rouit to ?? Looks like it goes up the firewall under the wipers .
I am thinking the conection on the other end is dirty or possible a busted wire some where . Under the car I took off the sheetmetal cover that goes over the fuel filter and saw no damage to the wires in that area ..

Any suggestions ?
Reply With Quote
Advertisement
  #2  
Old 08-31-2012, 06:31 PM
drivinfaster's Avatar
drivinfaster drivinfaster is offline
bimmerfest Supporting Member
Location: in the sticks you piney
 
Join Date: Nov 2007
Posts: 10,724
Mein Auto: rescued bmw's
i believe there is a relay for the heater circuit. you may wish to check your fuse center for one marked as such.




df
__________________
Reply With Quote
  #3  
Old 08-31-2012, 06:33 PM
Cipher_tx's Avatar
Cipher_tx Cipher_tx is offline
Officially Welcomed to the 'Fest
Location: Near the swamp, FL
 
Join Date: Oct 2010
Posts: 323
Mein Auto: '93 325i sedan
This is why I'm glad I only have one O2 sensor. Silly problems with emissions crap.
__________________
Reply With Quote
  #4  
Old 08-31-2012, 06:36 PM
drivinfaster's Avatar
drivinfaster drivinfaster is offline
bimmerfest Supporting Member
Location: in the sticks you piney
 
Join Date: Nov 2007
Posts: 10,724
Mein Auto: rescued bmw's
meh, we've had 'emissions crap' ever since the 60's....



df
__________________
Reply With Quote
  #5  
Old 08-31-2012, 06:38 PM
Cipher_tx's Avatar
Cipher_tx Cipher_tx is offline
Officially Welcomed to the 'Fest
Location: Near the swamp, FL
 
Join Date: Oct 2010
Posts: 323
Mein Auto: '93 325i sedan
Well yeah, but I like the single pre cat sensor.

Emissions diagnostics irritate me as well, since it's always some stupid evap system problem.
__________________
Reply With Quote
Reply

Bookmarks


Forum Navigation
Go Back   Bimmerfest - BMW Forums > BMW Model Discussions > 3 Series / 4 Series > E36 (1991 - 1999)
Today's Posts Search
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



Forum Jump


All times are GMT -7. The time now is 12:07 PM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2014, vBulletin Solutions, Inc.
© 2001-2011 performanceIX, Inc. All Rights Reserved .: guidelines .:. privacy .:. terms