Volvo AWD V70-XC70 Forum

INDEX FOR 1/2026(CURRENT) INDEX FOR 11/2007 V70-XC70 INDEX

[<<]  [>>]


 VIEW    REPLY TO THIS MESSAGE    PRINT   SAVE 

rear O2 sensor no output V70-XC70 1998

posted by  packard8 on  Sun Nov 16 03:50 CST 2008
Author: [PROFILE] [EVERY POST] [THREADS] [BEST POSTS] RSS Feed     [IGNORE ALL POSTS]
last visit: Thu Oct 16 15:16 CST 2014
[RELATED]

1998 V70 5-spd 269k. I am not geeting any output from the rear O2 sensor, with occasional CEL codes for it. I replaced the sensor with an OEM one, but still no output (measured on PC via OBD connector - front sensor switching OK between 0.1 and 0.9V). The blue book has you check resistance from the connector through the ECM to ground. For pin 4 its says to expect 50 ohms, and I get 51. For pin 3 I should have 200 ohms, but get 100. For both I get infinite resistance with the ECM removed. This shows the wiring is OK through the ECM. Does all this mean I need to replace the ECM, or am I missing something else?






THREADED THREADED EXPANDED FLAT PRINT ALL
MESSAGES IN THIS THREAD

New rear O2 sensor no output [V70-XC70][1998]
posted by  packard8  on Sun Nov 16 03:50 CST 2008 >


<< < > >>



©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.