Volvo RWD 200 Forum

INDEX FOR 1/2026(CURRENT) INDEX FOR 3/2003 200 INDEX

[<<]  [>>]


 VIEW    REPLY TO THIS MESSAGE    PRINT   SAVE 

Code 221 and 231 200

posted by  henryc on  Mon Feb 18 12:22 CST 2002
Author: [PROFILE] [EVERY POST] [THREADS] [BEST POSTS] RSS Feed     [IGNORE ALL POSTS]
last visit: Mon Sep 3 14:54 CST 2001
[RELATED]

The LH 2.4 and 3.0 systems include logic to bias the fuel mixture for normal wear and tear. I think it amounts to a memory location in the ECT that is used as the starting point for air / fuel mixture control. When the bias reaches a preset limit, it sets a fault code.

Unplugging the battery will reset this variable back to the factory default. An alternative is to pull the EFI fuse (either #1 or #31).

I found this information in the green Volvo manual. The manual includes a readable wiring diagram of the EFI and ignition systems. It was about $36 including postage and handling.





THREADED THREADED EXPANDED FLAT PRINT ALL
MESSAGES IN THIS THREAD

New Code 221 and 231 [200]
posted by  r53hill  on Wed Jan 30 12:40 CST 2002 >


<< < > >>



©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.