Rick's Free Auto Repair Advice

Posts Tagged: Bank 2

P0175

P0175 System too Rich (Bank 2) If you have a P0175 System too Rich (Bank 2)trouble code, read this to understand what it means This trouble code indicates that the oxygen sensor on bank 1 (the bank that does NOT have 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

P0174

P0174 System Too Lean (Bank 2) If you have a P0174 System Too Lean (Bank 2)  trouble code, read this to understand what it means Lean codes are incredibly difficult to diagnose. And it’s one trouble code where you don’t want to start throwing parts at the problem. The guys at the parts store will tell you to replace the Oxygen sensor. Nice guess, but probably wrong. They’re assuming that the fuel mixture is correct but the sensor is reporting it wrong. Oxygen sensors DO wear out. But what if the … Read More


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