Introduction to automotive oil indicators
Auto instruments will be a variety of dynamic information during the driving process of the car to summarize, to facilitate the driver to understand the working conditions of each system at any time, to ensure a safe and reliable driving environment, and the oil lamp is one of the most important information. The full name of the oil lamp is the oil pressure warning light, which is installed on the engine sensor to monitor the oil pressure in real time, and the information obtained is fed back to the driving instrument, if the oil pressure is sufficient, the warning light is extinguished; if the oil pressure is abnormal, the fault light is lit for early warning. So, what causes the car oil pressure warning light to light up? And how should it be solved? Let's look down together.
Causes and solutions of oil pressure lamp lighting
First, the engine is caused by a lack of oil, which is also one of the most common causes of failure. Because when the engine oil level is low, the oil pressure will decrease, the sensor detects that the oil pressure is low and will light the fault light warning, and the engine will be accompanied by a large "buzzing" noise at this time. The reasons for the lack of engine oil can be roughly divided into two types, one is leakage, such as oil seal damage, rubber gasket aging, etc.; the other is the engine internal burning oil, such as piston ring stuck, opening gap is larger, valve oil seal aging and so on.
Solutions to the causes of such failures: you need to open the lid first to check whether the oil of the vehicle is sufficient, which is generally reasonable between the upper and lower scales of the ruler. If it is lower than the lower tick line, it means that the vehicle lacks oil, and then observe whether the oil leaks after replenishing the oil, if there is an oil leakage phenomenon, it is necessary to treat the location of the oil leakage; if there is no oil leakage, it means that the engine has a burning oil failure, and it is necessary to replace the piston ring and valve oil seals and other parts.
The second is the wrong type and viscosity of the oil used, if the vehicle used a higher viscosity oil before, and now it is replaced by a lower viscosity oil, it will lead to an early warning of the oil pressure lamp. This is because the pressure value of the oil is proportional to the viscosity of the oil, and when the viscosity of the oil is reduced, the oil pressure will naturally decrease.
Solutions to the cause of such failures: only need to replace to the previous oil viscosity can be solved, if you do not know the viscosity of the oil used in your vehicle, then you can also find a yo by checking the vehicle manual, and you can also ask the relevant after-sales staff of the 4S store.
Third, the engine mechanical failure, such as oil pump internal wear, oil filter blockage, oil duct blockage, large and small tile wear pressure relief, cylinder blockage and cylinder head on the oil check valve damage will cause oil lamp early warning, such mechanical failure causes are more, here is not listed one by one.
Solution to the cause of such failure: first measure whether the oil pressure is normal, if not, it means that there is pressure relief and blockage inside the engine. At this time, it is only necessary to remove the oil pan to observe whether the filter is blocked and carry out targeted treatment. For a clogged oil duct failure, the handling process is relatively complex and it may be necessary to disassemble the engine to find the final source of the failure.
Fourth, the oil pressure sensor itself is damaged, the sensor is equivalent to the hub of the entire alarm system, if it is damaged by itself, even if there is no shortage of oil, it will cause the warning light to light up. In such a situation, the vehicle can continue to drive, but it is recommended that the owner first check the oil level and whether the engine is leaking oil.
Solution to the cause of such failures: Only the oil pressure sensor needs to be replaced to troubleshoot the problem. It should also be noted that if the wiring harness connected to the sensor is short-circuited, virtual and other faults will also lead to the same phenomenon, at this time it is necessary to measure the wiring harness voltage to determine the cause. The general oil pressure sensor has a voltage of 0V when starting the vehicle, and a voltage of 12V when the ignition switch is turned off and turned on, if the measurement result is different from the standard data, it represents the problem of the sensor wiring harness.
All in all, there are roughly four reasons for the auto oil pressure warning light to be lit, namely the lack of oil, the oil viscosity error, the engine mechanical failure and the sensor itself damage, hoping to help the majority of car friends and maintenance technicians, reduce the daily use of cars, repair car troubles!