Fix code P0172 System too Rich (Bank 1)
If you have a P0172 System too Rich (Bank 1)trouble code, read this to understand what it means
This trouble code indicates that the oxygen sensor on bank 1 (the bank that has cylinder #1) is reporting a rich mixture. Do NOT automatically assume that you have a bad oxygen sensor. This code can also be caused by a misfire or a bad fuel pressure regulator.
© 2012 Rick MuscoplatPosted on by Rick Muscoplat