Asked by: Kandela Tropinov
asked in category: General Last Updated: 23rd May, 2020

What can cause a p0172 code?

Causes of Code P0172 and How to Fix
The most common reasons include a faulty oxygen sensor or a dirty mass air flow sensor (MAF). In addition, here are some additional causes of throwing code PO172. Cooling system that's been retrofitted (ie: thermostat removed, fan running direct, etc.)

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Also asked, how do I fix code p0172?

  1. A repair of a vacuum leak.
  2. A replacement of a faulty fuel injector, fuel pump, or fuel regulator.
  3. Replacement of an excessively restricted air filter.
  4. Replacement of the thermostat or coolant temperature sensor.
  5. A replacement of the spark plugs.

Additionally, what happens if a car runs too rich? If there is too much fuel and not enough air, the engine is said to be “running rich”, or “has a rich mixture”. Either condition will result in poor fuel mileage or possible engine damage. A rich mixture will cause the vehicle to run hot.

Herein, what causes p0172 and p0175?

An "over reporting" Mass Air Flow Sensor can be a common cause of a code P0172 and P0175. Essentially, this means that the Air Flow Sensor is telling the computer that much more air is entering the engine than actually is. It is important to restate that the Oxygen Sensors are accurate—the fuel mixture is too rich.

What is System Too Rich Bank 2?

Error Code P0175 is defined as Engine Too Rich Bank 2. As its definition suggests, this code describes a rich condition problem (exhaust with too little oxygen) on O2 (oxygen) sensor Bank 2. For vehicles on V6, V8 or V10 engines, the Bank 2 is located at the side of the engine without cylinder #1.

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