FORD DIAGNOSTIC CODE P0172 HOW TO

How To Diagnosis Code P0172? Difficulty of Diagnosis and Repair вЂ“ 3 out of 5 Reading and analyzing fuel trims and the freeze frame data is the key to properly diagnosing P0172. Many people will replace the air-fuel sensor or O2 sensor as soon as they get a bad reading, but the root cause is often a dirty or faulty Mass Air Flow (MAF) Sensor or vacuum leak, thus causing the O2 or A/F sensor to read differently to compensate. It is important to complete the entire diagnostic process when diagnosing P0172. It is okay to drive a vehicle with P0172 for a short period of time, but driving with this code for an extended period of time can cause internal engine damage and failure of the catalytic converter. Leaky fuel injectors allowing too much fuel into the combustion cylinders.Dirty or faulty Mass Air Flow (MAF) sensor.When these adjustments become too large, code P0172 is triggered. To keep the engine running properly, the powertrain control module (PCM) tries to compensate for the rich condition by injecting less fuel to the mixture in an effort to maintain the proper 14.7:1 air-fuel ratio. When the upstream oxygen sensor detects there are less than 14.7 parts air to 1 part fuel in the air-fuel mixture, a rich condition exists. What Does P0172 Mean?Д¬ombustion engines run most efficiently when they maintain an air-fuel mixture ratio of 14.7 parts air to 1 part fuel. Bank 1 has more fuel then it should or not enough air.

Ford diagnostic code p0172