Just got a cel and it says p0171 bank 1 too lean..

Looked it up online and most said it's either a dirty maf, bad maf, and/or front o2 sensor?

Anything else you guys can come up with that might cause me to get this code?

 

its almost always a vacuum leak.

 

fixed it. my after maf tube hose clamp wasn't even on...lol. it came loose somehow. like shane said, it was def a leak. lol