I was wondering what is needed to make the Switch to read a/f ratio... is it just the wideband sensor itself, or does it need that little box to?

can someone please explain how different widebands operate?

 

i'm pretty sure you will need the whole wideband setup, box and all then you just wire the switch into the wideband. but i could be wrong. i am running a dynojet wideband commander which has a programmable warning light for lean conditions.... that is my shut down switch.

 

It will work with the stock narrow band alread in your car or with a wideband that you would add to your car.

Dean