So still getting to the bottom of my lean bank 1 and 2 code. Since the CEL usually illuminated as I’m on the power, I’m kinda leaning towards replacing the coolant temp sensor. Can anyone check that secret menu you access through the radio by pressing and holding the station-adjustment ****?
Mine says: “TEMP 80 and TEMP 54”
thanks…. I’ll get to this solution one day🙄

 

If 80 is coolant, that is low since engine temp should be just over 95c. But this could also indicate a t-stat that is not fully closing.