Scanners ?

I just talked to the tech and he said basically don't worry about it if it's running good. No one can give a real answer. Sometimes it doesn't even show the #56 when I scan.

Battery cable clear the computer, start the truck and don't touch the pedal. Turn everything on ac/lights etc and let it learn idle.

It was hot out again today 90+ and seems it effects how smooth the idle is, but it's still not hesitating.
 
I'm finding there seems to be no real answers to this. What system for what years (mode 6, hs/ms or both) what sensors you have, what the numbers are telling you. 2006 ford ranger 3.0, what can I read and what setup do I need to access the info.

Ford guy says he never uses mode 6, don't worry about it !
 
I got a lot of help on a couple of forums and found an O2 sensor was buggy. Today I finally got a CEL and one sensor threw a code. Luckily I've had all four of these new sitting on the kitchen counter for a few years, lol.

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