Volvo AWD Forum

INDEX FOR 10/2025(CURRENT) INDEX FOR 6/2013

[<<]  [>>]


 VIEW    REPLY TO THIS MESSAGE    PRINT   SAVE 

1991 Volvo 940 Turbo ECU/Cooling Sensor/Check Eng Light problem 1991

posted by  9Shenandoah on  Wed May 5 03:30 CST 2004
Author: [PROFILE] [EVERY POST] [THREADS] [BEST POSTS] RSS Feed     [IGNORE ALL POSTS]
last visit: Mon Apr 16 10:09 CST 2007
[RELATED]

My check engine light comes on repeatedly on my --almost everyday--and I know each time its code 1-2-3, for ECU Coolant Sensor. I have
(1) Replaced the Coolant Sensor
(2) Hardwired the Coolant Sensor (bypassed the wiring harness in case there was
a crack in the wiring) to the two computer modules.
(3) Put dielectric compund on the connector to the ECU coolant sensor (underneath
cylinder #3)

Yet still I get the darn Check Engine Light everyday! The funiest thing is I dont have to reset by flashingthe diagnostics computer for 5 seconds twice--my onboard computer to make it go away--all I have to do is disconnect the battery terminal.

DO I HAVE A BAD ECU?
COULD A COOLANT LEAK or momentary Temperature Spasm cause this?

1991 Volvo 940 Turbo ECU/Cooling Sensor/Check Eng Light problem





THREADED THREADED EXPANDED FLAT PRINT ALL
MESSAGES IN THIS THREAD

New 1991 Volvo 940 Turbo ECU/Cooling Sensor/Check Eng Light problem [1991]
posted by  9Shenandoah  on Wed May 5 03:30 CST 2004 >


<< < > >>



©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.