P0171 GMC -2004 envoy where is this part located on the engine

Question

Can you locate the part on the envoy engine]1

Answer 1

HI there,

P0171 is a lean fuel trim code for bank 1. There isn't a specific part for this code. Usually it can be the result of a front O2 sensor issue on bank 1. It can also be caused by a intake manifold gasket leak or exhaust leak.