Lambda Light

[nikgallagher]

On my way in to work this morning the lambda light came on. Not having the manual with me, i am a bit worried to drive it home as I can't remember what it means. Looks as though I will need to get the fault code read, but being a 96 854 T5, it needs a seperate OBDII thing, which I assume means a trip to a volvo dealer? Anyone have any ideas as to the cause, and if it will be ok to drive it home later? Many thanks in advance. Nik

[nikgallagher]

Just had a thought. I am changing the thermostat this weekend, as it appears to have failed open. Temperature gauge sits at 3 o'clock in traffic and drops right down when on the motorway. As most of my journey in this morning was at about 60-70mph and the outside temp is about -1 deg, could it be that the low coolant temp is keeping the fuel mixture rich, and thus putting the air/fuel mixture outside the working limits of the cat? They only have a small tolerance for deviation away from stoichiometric before they become defunct, don't they? Or is that far too cheap a solution!!