Hello group.
I'm new here, so far the little Echo has been running fine, giving me no reason to inquire. However, some time ago the MIL light went on and wouldn't go out. I bought a code reader and it gave me P0172 - system too rich (bank 1).
Can anyone interpret this? Where do I go from there? Shoud I suspect the oxygen sensor or the mass air flow sensor? There seem to be no air leaks along the intake.
Any help will be appreciated. TIA
Radek in Ottawa, Canada