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  #1  
Old 07-02-2000, 01:18 PM
engatwork's Avatar
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Join Date: May 2000
Location: Soperton, Ga. USA
Posts: 11,773
here is the detail for changing out the O2 sensor on a 1995 E320.
1) put car up on rack to allow access to underside of automobile. Always review safety aspect of what you are about to do prior to climbing underneath.
2) pull up the carpet in the front passenger side and find the blue wire coming from the area underneath the gear selector area. Follow it to the connectors and disconnect them.
3) go back underneath the car, locate the O2 sensor right about straight underneath the gear selector area and pull the "plug/seal" out from the driveshaft tunnel and pull the O2 sensor wire all the way through until the wire no longer goes through the driveshaft tunnel.
4) using a 22 mm open end wrench remove the existing sensor making sure that the old gasket comes off with it (looks kinda like a spark plug gasket).
5) install the new sensor with gasket (do not wipe off the grease that is pre-installed on the sensor threads). Be real careful to insure that you turn the wire WITH the sensor to keep from breaking any of the wires in the bundle.
6) tighten the new sensor with the 22 mm open end until you can "feel" that the gasket has seated (kind of similar to a spark plug gasket.
7) route the new wire through the hole in the driveshaft tunnel and re-install the "plug/seal" back into the hole to prevent dirt, etc from entering the cockpit.
8) Plug the wires back into their existing connectors. Reinstall the carpet/mat and you should be ready to go.
I performed the above this past Sat. and found it to be pretty simple.
engatwork
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  #2  
Old 07-06-2000, 09:19 PM
engatwork's Avatar
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Join Date: May 2000
Location: Soperton, Ga. USA
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After changing out the sensor my gas milage has gone from averaging 25.5 to 27.4
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  #3  
Old 07-07-2000, 02:24 PM
J.HIDALGO's Avatar
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Join Date: Jul 1999
Location: Jax, FL
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Why did you change the O2 sensor? Maintenance, problems, symptoms, mileage, etc? Please tell us. I know you already mentioned increased mileage but, any other "noticeable" effects?
TIA
J.H.
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  #4  
Old 07-07-2000, 05:58 PM
engatwork's Avatar
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Join Date: May 2000
Location: Soperton, Ga. USA
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Yea, dumbass me ran a can of fuel injection cleaner through it. I probably have clean injectors but it sure was hard on the O2 sensor. After I ran that F.I. cleaner through it the check engine light came on and I got the #12 code which is indicative of a bad sensor.
BTW I am assuming that the FI cleaner did the O2 sensor in. In reviewing the service records the O2 sensor had never been changed (84,000 miles) so it may could have been coincidence.
engatwork
'95 E320
'97 Honda CR-V
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  #5  
Old 07-07-2000, 06:11 PM
cheeman
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How would fuel injection cleaner affect the O2 sensor? I don't know much about this subject. But I am assuming as I pour my Techron in the tank that its safe for my car??

If its been discovered that FI cleaner is not compatible with the car, is there an official statement I missed? I just want to make sure what the story is.

Thx
Michael Chan
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  #6  
Old 07-07-2000, 09:40 PM
engatwork's Avatar
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Join Date: May 2000
Location: Soperton, Ga. USA
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It may not have had anything at all to do with it. I have always changed the O2 sensors around 80k miles. I did not have an analysis performed on the sensor and the actual code indicated there was a problem with the O2 senser heater circuit. I will never know. The can did say that it was safe for O2 sensors for ALL cars. I will repost again when I run another can through at 160k miles (right before I replace the sensor again).
engatwork
'95 E320
'97 Honda CR-V
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