what does p0171 engine code for a 2005 chevy pickup

Question

my chevy 1500 work truck is displaying a p0171 engine code

Answer 1

HI there,

This code means there is a lean fuel mixture on bank 1. This can be caused by an intake manifold gasket and sometimes the front O2 senor on bank 1. I would start by checking for intake leaks. Since it's only on one side of the engine it usually points to something that only affects that bank.