The absolute pressure sensor is an integral partelectronic engine management system. It is he who reacts to the slightest changes in pressure in the intake tract. The control unit, guided by the readings of this sensor, ensures the normal start and operation of the internal combustion engine both in urban and suburban conditions.
What does this part consist of?
The absolute pressure sensor (VAZ) consists ofseveral details. These include a signal re-processing circuit, a converter that is equipped with a special sensing element, as well as many body parts. In general, the element itself is very reliable, it can break only as a last resort. Below we will consider those situations, because of which this part fails.
Absolute pressure sensor in the intake manifold and its malfunction
Depending on how it workselectronic engine management system (whether it has a mass air flow sensor or not), this element may become unusable for a variety of reasons that lead to switching the operating mode of the internal combustion engine to an emergency one. In the worst case, the engine does not start at all because of faults in this part. In general, the main source of such trouble is the poor connection between the sensor and the inlet fitting.
It often happens that the engine goes intoemergency mode due to an incomplete pipeline. The last spare part has a very flexible design. Therefore, if the absolute pressure sensor breaks down, carefully check the condition of the pipeline.
In addition, one of the causes of malfunctionsThis part is a broken air temperature sensor. It is strongly interrelated with the absolute pressure device (both can be combined into one), so the breakdown can occur immediately in two parts.
The least frequent cases are when the sensorof the absolute pressure itself comes into malfunction, and all other parts of the electronic engine control unit continue to function. In this case, you need to send the car for diagnosis and check the status of this item. By the way, this process can be done without reference to the SRT. It is enough to connect the wire to the nipple and then monitor the output signal of the sensor with the engine on.
Why can there be a breakdown?
Most often the defect of this partarise from the depressurized vacuum hose, which may or may not be connected to the MAP sensor, or simply damaged. Another failure may occur due to a short circuit that occurred in the electronic circuit of the sensor signal. In addition, the problem may be in the clipping of the mass. And the biggest reason is the malfunction of the entire electronic engine control unit. In this case, you need to do everything with the help of specialists and in no case should you repair the system yourself (unless, of course, you are an experienced mechanic). This happens very rarely, but every car has a risk of breakage.
