Rick's Free Auto Repair Advice

Posts Tagged: System too Rich


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

P0172, P0175 — system too rich

P0172, P0175 System too Rich — how to diagnose How to diagnose a P0172, P0175 system too rich condition P0172 – System Too Rich Bank 1 P0175 – System Too Rich Bank 2 A P0172, P0175 means the engine’s air/fuel mixture is too rich; too much fuel and too little oxygen. The ECM determines this by seeing little to no oxygen in the exhaust stream. When it sees this condition it reduces the fuel injector ON time to dial back the amount of fuel injected into each cylinder. Symptoms you … Read More

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