The message to which you are about to reply is shown first. GO TO REPLY FORM



 VIEW    REPLY TO THIS MESSAGE    PRINT   SAVE 

Is there any need to run a ground to the 3-wire O2 sensors ? 700 1985

posted by  ndesouza on  Sat Sep 4 21:44 CST 2004
Author: [PROFILE] [EVERY POST] [THREADS] [BEST POSTS] RSS Feed     [IGNORE ALL POSTS]
last visit: Sun Mar 18 15:14 CST 2012
[RELATED]

Hi,

I've been checking out the O2 sensor on my 85 740 GLE Non-Turbo. The 2 white-wires going to the 2-wire connector are the heater - right ? And the single green wire with the clip is the +ve connection of the generated voltage - correct ? Also - when testing the sensor by making the mixture lean/rich, I am measuring the voltage across body-ground and the green-terminal. Does the o2 sensor need to be unplugged to do this ?

Was somewhat surprised to note that the sensor dosn't have a separate -ve / grounding wire - considering that the voltage generated is so small.

Has anyone run a separate ground wire to the sensor and seen any benefit ?

Thanks !

Noel






USERNAME
Use "claim to be" below if you don't want to log in.
PASSWORD
I don't have an account. Sign me up.
CLAIM TO BE
Use only if you don't want to login (post anonymously).
ENTER CAPTCHA CODE
This is required for posting anonymously.
OPTIONS notify by email
Available only to user accounts.
SUBJECT
MODEL/YEAR
MESSAGE

DICTIONARY
LABEL(S) +
IMAGE URL *
[IMAGE LIBRARY (UPLOAD/SELECT)]

* = Field is optional.

+ = Enter space delimited labels for this post. An example entry: 240 muffler


©Jarrod Stenberg 1997-2022. All material except where indicated.


All participants agree to these terms.

Brickboard.com is not affiliated with nor sponsored by AB Volvo, Volvo Car Corporation, Volvo Cars of North America, Inc. or Ford Motor Company. Brickboard.com is a Volvo owner/enthusiast site, similar to a club, and does not intend to pose as an official Volvo site. The official Volvo site can be found here.