Hi i have a 2015 ford focus st. 62k miles gtx2867r gen 2 big turbo with hks bov. I keep popping this code bank 1 lean. No rough idle, no hard starts, no stalls. Car acts and drives as if nothing is wrong. So i dont believe its a vaccum leak 2ndly car can hit boost. Hits 25lbs then holds at 23. Idk where to go from here.