Hey! ,I'm new to this forum and to jeeps ,I've purchased a 1997 jeep wrangler about 2 weeks ago (2.5L 4 cylinder) ,after purchasing it in 3 days the check eninge light came on,took it to a close by shop and read the codes . It's reading P0171=system too lean (Bank 1) and P0131= O2 sensor circuit low voltage (Bank 1,Sensor 1).
After a little research I saw that people are saying to replace the MAP sensor so I did as well as the O2 sensor ,I reset the light,after like 2 hours it came back on! :/ reading the same codes.I really don't know what to do at this point,any help will be really appreciated! Thanks!