P0171 KIA -

Question

My code says system too lean. Bank 1. Which is bank 1?

Answer 1

Hi there,

With the 4 cylinder engine you only have one bank. This code can be caused by several issues, a bad mass air flow sensor, a faulty front O2 sensor, low fuel pressure, a plugged converter, an intake manifold leak can also cause this. Each needs to be eliminated to find the problem.