Hey guys! Started throwing a few codes and idling funny..... P1171, p1590, and p1174. From research, I'm leaning toward MAF sensor but thought I'd stop by here for any talk about experiences and advice! Seems to be fine when I'm on the gas but doesn't idle smooth sitting still. Got a little hitch in it's giddy up... TIA for any ideas!

 

Check for vacuum leaks, loose hoses. Any kind of of leak or loose hose can cause the 1171/1174 codes. The P1590 is a rough road code not sure why that is showing up.

 

Yes, check for vacuum leaks and inspect intake hose/tube between MAF and throttle body for loose connections. MAF would also be suspect. Check your air filter too, while your in there.

​​​​​​​ Brian.