It's difficult to reset the lambda counter without removing it, but it can be done. There is a reset dial that is turned to bring the counter back to zero, but it is flat with two small holes. I reset mine by making an impression of the dial with clay, marking the clay with ink, and pressing a small piece of plastic against the clay; I used a plastic bottle cap. The ink left two dots on cap, forming a template. I tapped two small brads into the dots and cut them to about 1-2 mm high with a dremel. This could then be used as a tool to turn the dial. However, you must watch the counter while you're doing it, so it helps to have a mirror and be able to read upside-down and backwards while using long, skinny fingers to turn a bottle cap a few degrees at a time. Or, you could remove and replace. Gus Schlachter Austin, TX 4695 --- In dmcnews@xxxx, RJRavalli@xxxx wrote: > Okay, I've already asked the dumb question about what the Lambda > light is for. Can someone help me with resetting the Lambda switch > though? I can't seem to find it on the part itself. I know this > has been covered before so if you can just send me a private mail > if you wish. > > Thank you for all the great help as always, > > Richard