Volvo AWD 850 Forum

INDEX FOR 10/2025(CURRENT) INDEX FOR 3/2010 850 INDEX

[<<]  [>>]


THREADED THREADED EXPANDED FLAT PRINT ALL
MESSAGES IN THIS THREAD




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

Aftermarket O2 sensor replacement ?????????? 850

My car kept throwing the 4--3-5 code so i replaced the o2 sensor, well I bought a universal 4 wire heated o2 sensor, now i keep getting 2--1-2 code saying the sensor signal is faulty or missing, i have it wired correctly, and have checked thoroughly for vacuum leaks, anybody tried these sensors before, I mean the instuctions had specific details for my volvo, i double checked the crimps on my connections and everything, and oddly it won't throw the code at idle, only after i drive it around for a minute or ttwo, any sugestions?








  REPLY TO THIS MESSAGE    PRINT   SAVE 

Aftermarket O2 sensor replacement ?????????? 850

i saw your message and went to OZBrick where someone was told what to do with a 4-3-5 code. something like: take it out, torch it, and then apply brake cleaner and re-install!!?? Better you check it out. i just figure i'll probably have same problem later on...ultimately!








  REPLY TO THIS MESSAGE    PRINT   SAVE 

Aftermarket O2 sensor replacement ?????????? 850

I do not have first hand experience with aftermarket O2 sensors for our 850's.

However, I have seens posted here in the past that the aftermarket sensors will not work with the 850 - why, I cannot answer.

As my own 850 is nearing the same point of needing the sensors replaced I hope someone can clear the issue up. I too would rather not spend the outrageous dealer markup for replacement O2 sensors.

Good Luck!








  REPLY TO THIS MESSAGE    PRINT   SAVE 

Aftermarket O2 sensor replacement ?????????? 850

Try to solder the connections instead of crimping. Crimping is not a reliable connection unless a very expensive crip tool is used,Tension reguated crimp tool cost anywhere from $150 to $ 500.
Good luck.








  REPLY TO THIS MESSAGE    PRINT   SAVE 

Aftermarket O2 sensor replacement ?????????? 850

I think the reason universal sensors won't work is because the Volvo calls for a specific resistance (which I forget but it's searchable here, or on volvospeed, or try t5uk.com).
Don [T-5R & V70]







<< < > >>



©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.