p0171 left bank lean. I just had all the coils plugs and valve cover gaskets replaced about 11 to 13,000 mi ago. Do you think I just need to replace my 02 sensors? That was the only code it was giving. It is a 01 v8 non sport.
prob rare that it came on when at 122,222mi ,wish I got a pic of that.

switch o2 sensor from the other side and reset code and then you wait til code comes up and if it says right bank instead then it's the o2

Gingerly shoot some carb/choke cleaner on the MAF. I got that code plus a P0174. I ordered the rear O2 sensors, but don't need them yet. I will be replacing the MAF as the stocker has ~168K miles on it.