hello im new to using a pico got mine a few days ago amazed how much this thing can do, but ive come up to a 6 wire lambda sensor and was wondering how i would test it maybe ive missed it on the software or the notes
Not much you can do with a 6 wire. On some types there is a wire which shows inverse proportianality to lambda value, Frank Massey expalins that in one of his videos - can't remember which, or where I saw it sorry.
If you have a mind to and equipment to do it you could monitor pump current which is proportional to lambda value.
If its a bosch lsu type, there is a load of info RE: wire diagrams on the net.