P0171 and P0174 banks 1 & 2 too lean

Disclaimer: Links on this page pointing to Amazon, eBay and other sites may include affiliate code. If you click them and make a purchase, we may earn a small commission.

scott schmerge

Full Access Member
Joined
Oct 9, 2018
Posts
612
Reaction score
284
Location
Charlotte, NC
Hey all, I got a p0171 an p0174 banks 1&2 too lean. I’m guessing vacuum leak. I just changed my oil two days ago. I’ve heard of the o-ring failing on the oil cap (mine was pretty grimy). I’m also suspecting it’s time for new pcv on the valve cover.

what’s puzzling me is when I checked voltages (using gap iid) on my maf sensors bank 1 had a voltage of -30 and bank two had a voltage of 1.5. No codes thrown for maf sensors...can someone verify those voltages?
 

Latest posts

Members online

Forum statistics

Threads
36,223
Posts
217,601
Members
30,474
Latest member
sawcut
Top