MAF sensors

Hectorrodrigo wrote: I think they are wrong from the name of the sensor onwards, the probe is called MAP and works as follows, scan the atmospheric pressure and delivers a signal to the computer on board and this compares it with the Lambda probe and according to those calculations determines the amount of gasoline and ignition times ... Is it clear?

Not at all clear and the one who is wrong is you, and doubly, first for not knowing what a MAF and second to disagree without being aware of what you are talking about.
Read with great attention what was written by Wolfi77 and there you will have reality and also for your knowledge I tell you that these two components for the measure of air mass can even be present, jointly or individual.

Juanfer wrote: I understand what a MAF sensor is and what are the symptoms that an engine presents when this sensor is defective?
Is there a defined procedure to diagnose faults in fuel injection vehicles, how should I correctly interpret the data shown by the scanner?

If it exists, each component has a test mode depending on that if it is a sensor or an actuator, it is necessary to help measurement elements such as multimeters, oscilloscopes, scanners, etc. With them, resistance and tensions, fixed or variable, operating frequencies, continuity, short circuits, etc. are tested.
The symptom for example of the MAF is the one mentioned by Wolfi, only lack of power, without fumes as is the case of a MAP, this element can be easily verified by disconnecting it, the ECU does not have its signal takes a fixed value of its strategy cartography and the engine recovers "almost" its entire power.

As for the interpretation of codes, it is necessary to be careful since the scanners or readers show the numeral codes and their definition of the failure on a component, but then it must be determined if the cause is the component, the wiring or their rabbit

I agree with what Wolfi77 and Charlypzz writes, we must not confuse one thing with another. You have to clarify doubts not to generate more or confuse things more.

Othoniel wrote: I agree with what Wolfi77 and Charlypzz writes, we must not confuse one thing with another. You have to clarify doubts not to generate more or confuse things more.

Exactly, I always criticize when information is wrong with nothing more than for the right to be written, the only thing that is achieved is to conflict and confuse the user in need of a solution.

We have not fought here but that we try to solve problems, it is correct that there are three ways to measure the flow or the amount of air that enters the engine either by MAP sensor, MAF sensor, or flow, now if they are hot thread or hot movie, it will depend on many things but, it is important that the person who asks the question knows if it is a MAP or a maf or a flow As for names and operations, the symptoms vary a little, usually a disconnected MAF annoyed a kilo apart from smoke, other symptoms, such as drowning and very low or very high release, now these elements are calculators if there is air leakage the sensor does not turn on the check light because it works but calculates badly since there is an extra air entry or lack of the same, it pulls it, it tends to keep it. A pleasant atmosphere let's avoid the watercolor of the other forists since it can confection and a very tense environment, here is not competed by those who save more or less, we just want to help abrasy and luck to all.