Volvo AWD 850 Forum

INDEX FOR 10/2025(CURRENT) INDEX FOR 5/2018 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 

Help! Check engine is ON 850 95

posted by  someone claiming to be Johnny Tam on  Mon Dec 17 10:03 CST 2001 [RELATED]

yesterday the check engine light is ON. After that, the car can't accelerate smoothly, sometimes fast, sometimes slow. Hope you get what I mean. I've retrieved the error codes and got 4-3-6 (Rear heated oxygen sensor compensation) then 4-3-5 (Front heated oxygen sensor - slow response) then a bunch of cylinder misfires code. Does that mean the rear oxygen sensor goes bad? Is it really hard to replace the rear sensor by myself? How much is rear oxygen sensor costs? alternatives?

Thanks.







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

Re: Help! Check engine is ON 850 95

posted by  someone claiming to be robert morris on  Mon Dec 17 13:38 CST 2001 [RELATED]

It would be a good idea to change both oxygen sensor. The new sensor have a pig tail on it. each sensor is 190.00. it is not hard to do you have to have a 7/8 wrench to take off the sensor. frist pick the front car up and take the sensors off and put the new sensors on and then put the car down to connect the sensor the sensor will show how to connect them







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

Re: Help! Check engine is ON 850 95

posted by  someone claiming to be gian on  Mon Dec 17 17:51 CST 2001 [RELATED]

look for and fix vac. leaks first

then replace O2 sensors if code continues






<< < > >>



©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.