Volvo RWD 200 Forum

INDEX FOR 1/2026(CURRENT) INDEX FOR 6/2005 200 INDEX

[<<]  [>>]


 VIEW    REPLY TO THIS MESSAGE    PRINT   SAVE 

High NOX failed emissions! Fixed 86 by pulling vacuum hose to ECU but this is 90 200 1990

posted by  Bonzo on  Tue Nov 2 11:22 CST 2010
Author: [PROFILE] [EVERY POST] [THREADS] [BEST POSTS] RSS Feed     [IGNORE ALL POSTS]
last visit: Fri Aug 29 15:50 CST 2014
[RELATED]

The HC reading is great (69.5 max is 174) and so is the CO (0.05 max is 1.12) but the NO is 2688 - limit is 1258 so it's about doubled.
In my 86 240 I pulled the vacuum hose to the ECU and it fixed it. But this is totally different ECU and located under passenger kick panel. Car has 196k miles but O2 sensor and cat. converter are not that old 4 years, 50,000 miles - have had both last a lot longer in other 240's. The exhaust does have a small leak between the exhaust manifold and front pipe. Could this cause a NOX problem? Any other ideas please?






THREADED THREADED EXPANDED FLAT PRINT ALL
MESSAGES IN THIS THREAD

New High NOX failed emissions! Fixed 86 by pulling vacuum hose to ECU but this is 90 [200][1990]
posted by  Bonzo  on Tue Nov 2 11:22 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.