Rick's Free Auto Repair Advice


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 Muscoplat

Posted on by Rick Muscoplat

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