Chevrolet optra 2005 p2279

Question

What's mean air intake system leak ?

Answer 1

Hi autocodes need your big help please.having a problem on my Chevrolet optra 2005.check engine came off.P0300 pending,dtc P2279 generic.did replaced pcv valve hose,clean throttle body,replaced resonator on the top of throttle body w/ sensor.replaced intake manifold gasket and also cleaned the fuel injector and replaced the o-ring on it.after I reset the codes and accelerate on park gear and when reach it 4000 rpm codes showed up.dont know what to do next.thanks for your answer.