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



 VIEW    REPLY TO THIS MESSAGE    PRINT   SAVE 

O2 sensor heater control system 200 1989

posted by  Maxspeed on  Tue Feb 18 02:28 CST 2020
Author: [PROFILE] [EVERY POST] [THREADS] [BEST POSTS] RSS Feed     [IGNORE ALL POSTS]
last visit: Mon Jan 20 21:55 CST 2014
[RELATED]

Hi all, it's been awhile since the last time I was here. My poor old 89 240 has mostly been parked for the last several years. I got it out the other day and noticed that the O2 sensor wasn't working too well. I replaced it with an NTK brand ( I'm not a big fan of Bosch anymore) anyway after replacing it my air control meter stayed at a steady level even after several minutes of warming the engine. If I kept the engine running above an idle it seemed to register correctly. Ok long story short, the O2 sensor is not getting any voltage to the heater side of the sensor. What I need to know is, Where does the O2 sensor get it's heater voltage from and what if any relays are involved? If anyone has a wiring diagram I can refer to or if anyone can just explain the most likely cause for the loss of heater voltage I would greatly appreciate it. Thanks for reading my message. Max. P.S. HI Art, been awhile.






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.