Volvo RWD 900 Forum

INDEX FOR 1/2026(CURRENT) INDEX FOR 2/2004 900 INDEX

[<<]  [>>]


 VIEW    REPLY TO THIS MESSAGE    PRINT   SAVE 

Persistent check light coming on 900 1995

posted by  Laozong on  Wed Dec 14 14:38 CST 2005
Author: [PROFILE] [EVERY POST] [THREADS] [BEST POSTS] RSS Feed     [IGNORE ALL POSTS]
last visit: Sat Mar 27 21:43 CST 2010
[RELATED]

940 year 95, non-turbo

I am getting this persistent check engine light that the DTU coded as 2-1-2. That refers to the O2 sensor. I've changed that (a new unit from Volvo) but the light continues to come on. I reset the DTU but the check light come on after a few kilometers on the road. I have to do this before I start every trip. Spoken with the mechanic who suspects it is the wiring (He is not good in this area).

I need guidance on how to check the wiring. I read somewhere here sometime ago that the 8-pin connectors at the right and left corners of the firewall may have something to do with that. I can't find that thread anymore. I took a look at the 8-pin connectors, there are 3 such connectors on the left side and 2 on the right side. Can someone tell me where do I start. As always I thank you all in advance for all your help, advice, and guidance.

Thanks
Laozong






THREADED THREADED EXPANDED FLAT PRINT ALL
MESSAGES IN THIS THREAD

New Persistent check light coming on [900][1995]
posted by  Laozong  on Wed Dec 14 14:38 CST 2005 >


<< < > >>



©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.