Why do MAF Sensors Fail?

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Reason Why MAF Sensors Fail:

Since the MAF sensor is liable for measuring airflow into the engine, they need plenty of air passing through it. In fact, quite 9000 liters of air can flow through the engine for each liter of fuel used. That’s plenty of air! And thereupon comes the potential for plenty of contamination. Dust, dirt, and other debris can all get into the sensor and are one of all the first causes of MAF failure.

Such contamination could occur as early as 18,000-25,000 miles, counting on the vehicle model. On small or compact cars, for instance, the MAF sensor can clog quicker, because it is situated during a smaller engine bay subjected to more risk in critical areas (oil vapor flows and combustion debris). During this case, a replacement becomes the equivalent of a protracted drain oil service… it almost becomes a service-style repair.

Other common failure problems include:

  1. A contact fault at the electrical connections
  2. Damaged measuring elements
  3. Mechanical damage from vibrations or an accident
  4. Measuring element drift (exceeding the measuring framework)

 

Look out for these in a failing MAF sensor:

When a MAF sensor fails, the engine won’t know the correct amount of fuel to feature, causing several common signs:

  1. Check engine light: like most engine management components, a controversy with the MAF sensor often causes the check engine light to return on.
  2. Engine runs rich at idle or lean under load: this is typically pointing towards a contaminated hot wire.
  3. Engine runs rich or lean: caused by the MAF continuously misreporting airflow into the engine – a process is required to substantiate this.
  4. Rough idle or stalls: a failed MAF sensor won’t send any airflow information to the ECU preventing it from accurately controlling fuel.
  5. Excessive vibrations when stationary.
  6. RPMs changing noticeably without driver input.

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