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



 VIEW    REPLY TO THIS MESSAGE Replies to this message will be emailed.    PRINT   SAVE 

Should I change the O2 sensor? V70-XC70 1998

posted by  KlausC on  Wed Mar 11 05:14 CST 2009
Author: [PROFILE] [EVERY POST] [THREADS] [BEST POSTS] RSS Feed     [IGNORE ALL POSTS]
last visit: Fri Oct 24 10:15 CST 2014
[RELATED]

Not directly. A leak into the intake manifold will cause the ECU to increase fuel volume and then cause the exhaust to have more unburned fuel, which then causes the front O2 sensor to get dirty and less efficient. Then the code for the O2 sensor is set.
There are ocassions where the heating element will not be efficient because of the dirt, allowing the heater to stay on too long and slowly burn out - that causes its own code, a slow responing O2 sensor.

There are 2 critical maintenance items that get overlooked by mechanics, usually because they take so long to develop. Cracked vacuum lines and clogged PCV lines/oil separator box, neither of which have diagnostic codes.
--
My name is Klaus and I am a Volvoholic.






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.