Welcome Guest ( Log In | Register )


Hello, we have answers for your Volvo-related questions!. Why not take a few moments to ask a question, help provide a solution or just engage in a conversation with another member in any one of our forums. Together we can make our Volvo community a better place.
 
Reply to this topicStart new topic
Do you like Volvo-Forums.com? Link to us and help spread the word about our forum. Thanks!
> O2 Sensor Failure, 98 S70 eating O2 Sensors
Duke
post Jan 12 2007, 11:32 PM
Post #1


Member
*

Group: Members
Posts: 50
Joined: 9-March 06
Member No.: 12,733
Status: Offline
Location: Virginia, USA
Drives: 1998 Volvo S70



I've been having a problem with my 98 S70 non-turbo eating O2 sensors for the last 6 months or so. I'll change one and the car will run great for a month or so then will start running very rich - the CEL will indicate the O2 Sensor. I read on Consurmer Guide. com that "Due to contamination entering via the reference tub, oxygen sensors may fail prematurely. (1998)" Can anyone tell me what the "reference tub" is or where it is?

Duke
Go to the top of the page
 
QuoteReply
marty
post Oct 29 2007, 10:22 AM
Post #2


Newbie


Group: Members
Posts: 5
Joined: 7-July 05
Member No.: 6,035
Status: Offline
Location: Birmingham, AL
Drives: 1999 S70T5



Duke, I am having the exact same problem with my "99 S70 t5. I wish someone could shed some light on this. I did find that you can get the sensor from Amazon for $59, instead if the $175 usual price.

Anyone have any ideas on this?
Go to the top of the page
 
QuoteReply
Duke
post Oct 29 2007, 07:55 PM
Post #3


Member
*

Group: Members
Posts: 50
Joined: 9-March 06
Member No.: 12,733
Status: Offline
Location: Virginia, USA
Drives: 1998 Volvo S70



Marty - In investigating my problem I learned a lot about the O2 sensors and the system. Several things can cause these to go bad including an exhaust leak, bad MAP sensor, or in my case a bad vacuum valve for the Secondary Air intake system. What happened on mine was that the vacuum valve was stuck open (as they often do) and it was letting exhaust moisture into the the hose leading to the air pump under the battery tray. When this pump would kick on after driving some distance on the highway then coming to a stop light, it would blast all that water into the exhaust pipes, over the O2 sensors and contaminate them.

Good luck Marty!!
Go to the top of the page
 
QuoteReply
marty
post Oct 30 2007, 07:03 AM
Post #4


Newbie


Group: Members
Posts: 5
Joined: 7-July 05
Member No.: 6,035
Status: Offline
Location: Birmingham, AL
Drives: 1999 S70T5



Duke, Thanks for the tip! I will check that out tonight. How can I find the valve in question?


Marty
Go to the top of the page
 
QuoteReply
« Next Oldest 1G (1998-2000) S70, V70 & V70XC Forum Next Newest »
  Advanced Search

1 User(s) are reading this topic (1 Guests and 0 Anonymous Users)
0 Members:

Reply to this topicStart new topic
Get your Volvo listed in the Garage Today, for FREE, to share with the world what you drive and what toys and modifications you have.

Collapse

> Similar Topics

  Topic Replies Topic Starter Views Last Action
No New Posts O2 Sensor
1 mong man 264 24th April 2014 - 05:24 AM
Last post by: Vermont
No New Posts Sensor Problems
3 Galaxy 1,610 29th January 2013 - 11:54 PM
Last post by: danielm85948
No New Posts O2 Sensor
1 straver 905 20th July 2011 - 04:51 AM
Last post by: danielm85948
No New Posts O2 Sensor
S80 2000
1 kidsgone 461 3rd March 2011 - 10:14 PM
Last post by: yuri_yermilov
No New Posts O2..sensor 2 Bank 2 2001 Volvo S80 T6
Aftermarket?
0 Bimmerguy 3,184 2nd February 2011 - 09:40 AM
Last post by: Bimmerguy

 
> Link To Us
If you found our site useful please link to us <a href="http://www.volvo-forums.com">Volvo-Forums.com</a>.
 
Time is now: 27th August 2014 - 10:04 PM
© 2004 Volvo-forums.com
Volvo-Forums.com is not affiliated with or endorsed by Volvo Car Corporation.
Privacy Statement