Jun 15, 2015, 07:46 PM
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O2 sensor placement problem
Thread Starter
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Joined: Feb 2011
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From: miami / delray beach
2014 E63s amg 4matic, 2009 C63, 2006 E55 AMG , 2001.5 AUDI S4 stg 3+ w/meth
O2 sensor placement problem
ok so i have been getting p2096 post catalyst fuel trim to lean bank 1 so after trouble shooting with jerry and reflashing my car after LT header install we decided that its the O2 sensor, so i ordered new o2 for bank 1 (passanger side)
when i went to put it in today the o2 sensor plug wouldnt fit the plug coming from engine bay...i know i have the right part number so just to be sure i pulled the rear o2 sensor that is just behind the collector about 6 inches after the front o2 sensor and low and behold the rear plug fit the replacement o2 sensor i bought...
so it looks like the shop that installed my long tubes put the rear O2 sensors in the front o2 position in and front o2s in the rear positioin... can someone confirm below that the pic and part # W0133-1786811 is the 02 sensor that is the one that goes in the first bung on the long tubes closest to the front of the car?
And is this one below, part # W0133-1717806, the second o2 sensor that come in the second bung on the collector?
thanks in advance
when i went to put it in today the o2 sensor plug wouldnt fit the plug coming from engine bay...i know i have the right part number so just to be sure i pulled the rear o2 sensor that is just behind the collector about 6 inches after the front o2 sensor and low and behold the rear plug fit the replacement o2 sensor i bought...
so it looks like the shop that installed my long tubes put the rear O2 sensors in the front o2 position in and front o2s in the rear positioin... can someone confirm below that the pic and part # W0133-1786811 is the 02 sensor that is the one that goes in the first bung on the long tubes closest to the front of the car?
And is this one below, part # W0133-1717806, the second o2 sensor that come in the second bung on the collector?
thanks in advance
Thread Starter
MBWorld Fanatic!
Joined: Feb 2011
Posts: 2,841
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From: miami / delray beach
2014 E63s amg 4matic, 2009 C63, 2006 E55 AMG , 2001.5 AUDI S4 stg 3+ w/meth
here are a few actual pics as i am looking again..
you can see in this pic is how the shop has the o2 sensors currently installed with the o2 sensor that has the black connector (part # W0133-1786811) going to the rear bung (the post catalyst one -rear) which i think is wrong ?
and here is a photo of what i have done on the other side which i think is correct with the o2 sensor that has the black connector (part # W0133-1786811) going to the front bung.
can someone confrim?
you can see in this pic is how the shop has the o2 sensors currently installed with the o2 sensor that has the black connector (part # W0133-1786811) going to the rear bung (the post catalyst one -rear) which i think is wrong ?
and here is a photo of what i have done on the other side which i think is correct with the o2 sensor that has the black connector (part # W0133-1786811) going to the front bung.
can someone confrim?
Thread Starter
MBWorld Fanatic!
Joined: Feb 2011
Posts: 2,841
Likes: 202
From: miami / delray beach
2014 E63s amg 4matic, 2009 C63, 2006 E55 AMG , 2001.5 AUDI S4 stg 3+ w/meth
update- just got off phone with Jerry at EC and he confirmed the o2 sensor with the black connector goes into the front bung and the o2 sensor with white connector goes into the rear bung- thanks jerry!
glad i didnt blow my engine from 3rd party shop install... people... you might want to make sure your shops dont reverse the o2 sensors as i can see why they might do it because with the long tubes installed it looks like the o2 with WHITE connector wont reach the rear bung (but it does) while the o2 sensor with the BLACK connector does reach it more easily, so i can see why the shop made that mistake easily... thankfully it didnt mess my engine up
glad i didnt blow my engine from 3rd party shop install... people... you might want to make sure your shops dont reverse the o2 sensors as i can see why they might do it because with the long tubes installed it looks like the o2 with WHITE connector wont reach the rear bung (but it does) while the o2 sensor with the BLACK connector does reach it more easily, so i can see why the shop made that mistake easily... thankfully it didnt mess my engine up
Last edited by gaspam; Jan 7, 2012 at 07:27 PM.
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From: San Diego
F-250
Thread Starter
MBWorld Fanatic!
Joined: Feb 2011
Posts: 2,841
Likes: 202
From: miami / delray beach
2014 E63s amg 4matic, 2009 C63, 2006 E55 AMG , 2001.5 AUDI S4 stg 3+ w/meth
yeah supposedly car should switch from closed loop to open loop and read off MAF transfer function and the open loop fuel table but if ecu doesnt do it at right time (which happens) then engine can go boom... luckily mine didnt but a few people's have when 02s were flip flopped... thankfully not me
this is an instance where a tuner could easily get blammed, if something bad happened , when in reality it would of had nothing to do with tuner and all to do with the install shop
this is an instance where a tuner could easily get blammed, if something bad happened , when in reality it would of had nothing to do with tuner and all to do with the install shop
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Joined: Jan 2008
Posts: 83
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2018 E63s, 2004 E55 AMG
I'm in the process of installing new sensors right now, and the downstream O2's have the black connector which fits in the front plugs, and the upstream's have the white connector that fits in the rear plugs!! How can so many parts catalogs be wrong? I ordered the upstreams from rockauto and the downs from FCPEuro. Of course the more expensive sensors on rockauto show the correct plug in the picture, which I know know from looking at my car. Anyone else have this problem?
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2014 E63S
[i also had this problem. Ordered 2 upstream from rock auto and2 down streams 4 down streams showed up. Down streams on my car have a 4 wire sensor upstream shave a 6 so I couldn’t get them backwards. Rock auto kinda sucks this is the 3rd wrong part I’ve gotten for this car.
QUOTE=spazmoid;5355068]I'm in the process of installing new sensors right now, and the downstream O2's have the black connector which fits in the front plugs, and the upstream's have the white connector that fits in the rear plugs!! How can so many parts catalogs be wrong? I ordered the upstreams from rockauto and the downs from FCPEuro. Of course the more expensive sensors on rockauto show the correct plug in the picture, which I know know from looking at my car. Anyone else have this problem?[/QUOTE]
QUOTE=spazmoid;5355068]I'm in the process of installing new sensors right now, and the downstream O2's have the black connector which fits in the front plugs, and the upstream's have the white connector that fits in the rear plugs!! How can so many parts catalogs be wrong? I ordered the upstreams from rockauto and the downs from FCPEuro. Of course the more expensive sensors on rockauto show the correct plug in the picture, which I know know from looking at my car. Anyone else have this problem?[/QUOTE]
