Date: Thu, 11 Aug 2005 02:41:00 GMT From: John B <rotten_NOSPAM_nospam.org> Subject: intermittent 'check engine'
Hi, I've been seeing an intermittent 'check engine' light in my 1992 900 (NA). I read the code (I'm getting rather practiced at reading codes these days) from the LH control unit. There were two stored: 1. "oxygen sensor self-compensating circuit problem (incorrext air-fuel ratio while driving)" 2. "air-fuel mixture too lean" Ok, so I'm thinking there must be an air leak somewhere, despite the fact that I just recently replaced most of the vacuum hoses. The trouble is that the warning light only comes on intermittently, and only when driving at highway speeds for at least 10 or so minutes. Also, the engine still seems to run ok when this is going on. So how can I figure this out? Thanks, John