i HAVE A 2011 AVEO WITH P0171 CODE

Question

IT ALSO surges with warmed up at low speed

Answer 1

P0171 Fuel system too lean.

When you have a fuel system too lean , an inspection for false air or vacuum leaks are the main cause for the symptom the vehicle has, If the air filter was replaced check and make sure   the MAF (mass air flow) is improperly seated . and the air duct to the MAF is properly attactched