Re: Engine Management Light
bouncing_soul - was your coming on and staying in, ie beep, beep and MCSM message appears for about 3 secs, then goes, engine light on the dash lights and remains. Each start up MCSM message appears and goes with the engine light always on. No hickups or loss of power ever ? No clearance until reset by garage ?
If so then I'm exactly the same. The codes always showed lamba and when caught with R/T diagnostics replaced, only to show the same err a few days later.
Reading you list I'm convinced its not the 'system' that is in err here. Each time my came on it was about 7 miles into a run and when the temp was < 3 oC. I was told the fault is logged and remains if the ready is out of scope, so given the weeks in between happening it could be one reading can cause this, ie 10 millisecs of time is all it needs.
Need somesome who knows the ECM better to comment, but I think it is something very simple here going on, if emissions is too high I think the light flashes for the duration so not a fuel issue here. Battery sprung to mind reading the other threads on this, but not surely after 7 miles of running would it cause the singal drop to trigger this ? Could be connectors expanding upto temp etc etc
Puzzling, but I'm holding onto mine now after 2 trips to the garage uncovered nothing, I think its something that just needs research from other data based on similar stories, that is if the fault is exectly the same as my issue. Replacing an ECM to me means guess work by the garage.