Hey guys i have a 06 5.3 and im throwing codes p0171 and p0174. Says bank one and 2 is lean. Any ideals on what this could be?
he has a o2 sensor on each side saying this though marc.
Recleaned the factory mass air flow sensor and put it back on (had a JET brand maf) and the problem went away. So id say it was the aftermarket mass air flow sensor.