Question

ive cleaned and changed o rings on injetters.replaced all the hoses.spark plugs and wires are new and i still get the code po171 and light stays on.. whats next to check

Answer 1

Hi there,

You can also get this code from a faulty front O2 sensor, bad mass air flow sensor and low fuel pump pressure. On occasion I've also seen it because of a leak in the exhaust system.