The car mechanism includes many systems, each of which plays a huge role in its operation. Failure of one can lead not only to failure, but also to damage to the other. If you do not monitor their condition, then this is fraught with negative consequences. To avoid this, you must constantly monitor their serviceability.
In order to monitor the car, a lot of devices and sensors are installed on it, which indicate the state. One of them is the oil pressure sensor. The vehicle’s lubrication system uses three types of oil supply to parts: by spraying, by gravity and by pressure. It is logical to assume that the first and second option simply can not fail, since the first is used to lubricate the walls of the cylinders, and the second - mechanisms and joints of gears.
Only one fault of this nature remains: pressure drop in the lubrication system. To determine it, a sensor is used, which is screwed into the engine block. His testimony is displayed on the dashboard. Here, there may simply be a control lamp, or maybe a device with a scale. Any car enthusiast knows that a burning oil pressure warning lamp will not lead to anything good. If the oil pressure sensor is on, it’s urgent to start looking for the cause. There may be several.
Perhaps the oil pressure sensor itself, which is screwed into the block, or the device, is faulty. This is checked by the testers, it is checked for resistance, the latter just needs to be fixed. If the oil pressure sensor still lights up, engine disassembly is inevitable. In the engine itself, there may also be more than one malfunction. First you need to get to the oil filter and check its tightness, and also find out if it is clogged. If this is the case, then the oil is simply not supplied to the system, and through the pressure reducing valve of the pump it is discharged into the crankcase.
If everything is in order with the filter, then you should think about the condition of the pump itself. There are times when a trifle gets under the pressure reducing valve and it freezes. A pump, even the most efficient one, cannot pump the required pressure under such conditions, it is simply bleed. This is a rare case, but it happens. If everything is fine, then you need to disassemble the pump and make sure that it is not demolished. This is done with a probe that measures the distance at the joint of the gears, as well as between the gears and the walls of the pump. For each car, such indicators are different, they can be found in the instruction manual.
If, after such operations, the oil pressure sensor shows a pressure lower than normal, then one option remains - wear of the liners and necks of the crankshaft. Its repair comes down to replacing the former or polishing the latter, in which case the liners themselves will still have to be changed. This repair is not too expensive, but there may be problems with the quality of parts, so you should pay special attention to this.
As a rule, the oil pressure sensor starts to burn first on a warm engine, and then only such a malfunction appears on a cold unit. The fact is that at high temperature the viscosity of the oil drops significantly, but at normal it remains at the proper level. If you do not pay attention to this at the first stage, then at the second repair can be much more expensive, up to replacing the crankshaft.