4 Nonetheless, here are some of the ways you can fix code P0172:.3 There are many causes of code P0172, and they are:.1 What Does System Too Rich Bank 1 mean?.Fortunately, a supplier like will help you resolve PCM issues.ДЄlthough P0172 might not likely lead to drivability issues, it can cause misfire. Power-train module (PCM) includes ECU, and for this reason, it may lead to code P0172. The right air-to-fuel ratio is about 14.7:1 since this ratio leads to fuel economy and can optimize engine power. Therefore, this makes the ECU to set the trouble code P0172. However, if the ECU malfunctions or the fuel injection system / o2 sensors experiences some problems, it may lead to the engine receiving more fuel than what it requires to maintain your vehicleвЂ™s power demands. It is the essential computer responsible for virtually managing every internal function of your vehicle, such as the amount of fuel going into the combustion chamber. The ECU (engine control unit) typically controls the flow of fuel and air into the combustion chamber.

If not, your engine might under perform or use too much fuel. Thus, for a successful ignition, a proper amount of fuel and air must enter the internal combustion chamber. Fuel and air are very critical for the internal combustion process.

Ford diagnostic code p0172