System too lean off idle bank 2 , Mazda 6,v6,2007

Question

Shows P2179. What to do next

Answer 1

HI there,

This code is most commonly caused by a faulty O2 sensor itself. The left side bank sensor is having an issue with staying lean. There are a few possible causes, check for intake leaks on that side of the engine and a possible exhaust leak as well.