P0174 Chevrolet -

Question

when I got code ran the guy at auto parts store oh that the m.a.s. so I was going to but a new one, but he said no just try to clean it first I cleaned it by removing air box and m.a.s. like the bottle directed but check engine light still on and still don't have the power it once had. amy help would be appreciated

Answer 1

Hi there,

This code is for a lean mixture on bank #2. Since it's only on bank 2, this may be an intake manifold leak on that side of the engine or could also be caused by a faulty O2 sensor. Because it's only on the single bank usually it indicates some type of added air but only on that side of the engine. This really usually is more about the O2 sensor then the maf sensor.