I have codes P0171 and P0174 and have had them for about a month now. When i first got the code i thought it might have been a dirty maf sensor so i cleaned out my air filter as well as my maf with electronic cleaner, CEL was still there. I then decided that my maf must be bad so i ordered a nee maf and installed it, CEL remained. I then checked all my vacuum lines to makes sure there wasn’t a leak anywhere, nothing was cracked and all hoses were in good condition. Does anyone have any idea what else could be causing this?