Volvo RWD 900 Forum

INDEX FOR 1/2026(CURRENT) INDEX FOR 5/2002 900 INDEX

[<<]  [>>]


 VIEW    REPLY TO THIS MESSAGE    PRINT   SAVE 

93 940 w/ Regina keeps tripping Check Engine light for knock sensor code 143 900

posted by  ippo on  Sat Jul 17 15:07 CST 2010
Author: [PROFILE] [EVERY POST] [THREADS] [BEST POSTS] RSS Feed     [IGNORE ALL POSTS]
last visit: Wed May 30 23:36 CST 2012
[RELATED]

My daughter's 1993 940 Non-turbo has the dreaded code 143 for "knock sensor signal absent or faulty." After clearing the code the light comes back on within two days. Checked the normal items listed here to no avail. Replaced the knock sensor with a new one from FCP Groton. Torqued the sensor bolt to 8 lb-ft with blue locktite. Cleaned the knock sensor connector with Deoxit. Pulled all the engine wire harness connectors at the firewall on the driver and passenger sides and cleaned with Deoxit. Keeps tripping code 143 ever couple of days.

Considering relocating the knock sensor wire harness away from the alternator wire harness but is this really a possible solution?

I think this explains why the previous owner pulled the check engine bulb from the dash.

Thanks for any advice.

Rob Ippolito
93 940 Volvo
90 740 Volvo GL Wagon






THREADED THREADED EXPANDED FLAT PRINT ALL
MESSAGES IN THIS THREAD

New 93 940 w/ Regina keeps tripping Check Engine light for knock sensor code 143 [900]
posted by  ippo  on Sat Jul 17 15:07 CST 2010 >


<< < > >>



©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.