My car is a Yuchai diesel engine, and the oil light is on when the car is idling, what s going on??

The oil is not enough, but you check the oil pressure sensor plug to see if it is broken.

It means that the pressure of the oil lubrication system is not enough when the engine is idling, and the general reason is that the organic oil pump is worn, the oil grade is low, and the viscosity is not enough.

Generally, it is a lack of oil or the oil pump is worn. Add some oil first, if it's not good, explain the oil pump.

The oil alarm light is on, which may be due to insufficient oil pressure or the fault of the oil pressure sensor plug itself. There are many reasons why the oil pressure is not enough, the oil pump pressure is insufficient, and the oil passage is blocked.

1. The viscosity of the engine oil is too large.

The viscosity of the oil is closely related to the quality of the oil, the higher the viscosity, the stronger the resistance of the oil to high temperatures, and vice versa. But it's not that the more viscosity the better, we should use the right oil grade for our engine.

2. The pressure limiting valve is blocked or improperly adjusted.

In order to prevent the oil pressure of the lubricating system from being too high and increasing the power consumption of the engine, resulting in oil leakage at the sealing connection in the oil circuit, a pressure limiting valve is set on the main oil channel or oil pump. Its function is to limit the oil pressure of the lubrication system so that it does not exceed the specified value. A faulty pressure limiting valve can cause the oil pressure to malfunction, causing the oil light to turn on.

3. The amount of engine oil is insufficient.

If the oil quantity is insufficient, the oil volume of the oil pump will be reduced or the oil cannot be pumped due to the air entering the pump, so that the oil pressure will drop, and the crankshaft and bearing, cylinder liner and piston will be aggravated by poor lubrication.

4. The engine temperature is too high.

If the engine cooling system has too much scale, poor heat dissipation, long-term overload operation or too late fuel supply time of the fuel injection pump, etc., the engine will overheat, accelerate the aging, deterioration, and thinning of the oil, leak from the gaps of each mating, reduce the pressure, and turn on the oil fault lamp.

5. The oil bypass valve is faulty.

The oil bypass valve is to maintain the normal oil pressure of the main oil channel, if its pressure regulating spring is softened or adjusted improperly, the mating surface of the valve seat and the steel ball is worn or stuck and closed loosely, the pressure of the oil will be reduced.

6. The oil filter is blocked.

When the oil filter is clogged and cannot flow, the bypass valve located on its base is opened and the oil enters the main oil channel without filtration. If the opening pressure of the bypass valve is set too high or too low, the pressure of the oil pump will rise or fall, which will also cause the alarm light to come on.

1.The oil volume of the engine oil is insufficient, so that the oil volume of the oil pump is reduced or the oil cannot be pumped due to air intake, resulting in the oil pressure dropping;

2.If the engine temperature is too high, it is easy to thin the oil, and a large amount of oil pressure will be lost from the mating gap, resulting in a drop in oil pressure;

3..When the oil pump parts are damaged or the gap is too large due to wear and assembly, it will cause the failure of the oil pump not producing oil or insufficient oil output;

4.The fitting gap between the crankshaft and the large and small tiles is improper, too tight will increase the oil pressure, and too loose will reduce the oil pressure;

5.Blockage of oil filters and suction discs will also reduce oil pressure;

6.Damage or failure of the oil return valve: If the spring fatigue of the oil return valve of the main oil channel is softened or improperly adjusted, and the mating surface of the valve seat and the steel ball is worn or stuck by dirt and closed tightly, the oil return volume will increase significantly, and the oil pressure of the main oil channel will also decrease;

7.Improper selection of engine oil: If the wrong oil or grade is not selected properly, the leakage will increase due to the low viscosity of the engine oil when the engine is running, so that the oil pressure will be reduced;

8.There is oil leakage and blockage in the oil pipeline.

See if the oil pump filter is blocked, or if there is a problem with the oil induction, generally these two problems!

1. You should find a safe place to stop and check whether the engine has abnormal noise, check whether there is oil leakage, if there is no abnormality after the inspection, it may be a false alarm of the fault sensor light. When the pollution light is on, the engine action does not shake or shakes slightly, at this time, the owner does not need to worry when using it, it can be used normally, and it can be checked or maintained when there is time or convenience.

2. The vehicle fault light is generally caused by the fuel emission system, you start and extinguish the vehicle when the fault light is on, and after starting and extinguishing the car three times, you observe whether the fault light is still lit when starting the vehicle, and if it is still lit, you need to go to the store in time to check the fault code to see whether it is the engine problem or the sensor failure.

There are many reasons why the diesel engine fault light is on, such as: 1. The car thermostat cannot be turned on, and the coolant cannot be circulated; 2. The radiator or engine water jacket is blocked, so that the coolant cannot be circulated and cooled normally; 3. The impeller of the water pump is corroded and aged, which makes the pump water pressure insufficient; 4. The heat sink of the water tank is abnormal, which may be deformed or blocked by foreign objects, which will affect the heat dissipation.

In addition, the cause of the diesel engine failure light may also be the engine ignition too late, the water pump belt aging too loose, etc. All in all, the diesel engine fault light is on, indicating that the vehicle engine is faulty, at this time, you should find a safe road section to stop as soon as possible, and wait for a while for the engine to cool down before the engine can be checked and repaired. Although sometimes the diesel engine fault light is lit, it may be just that the sensor is damaged and cannot detect the corresponding vehicle condition information, but the owner had better not take a chance to continue to use the car to avoid danger.

When the engine fault light of the car with diesel engine is on, it means that the engine of the car is faulty, and it is necessary to check whether there is a problem with the electronic control system of the car engine, which is generally caused by the damage of an electronic component of the car.

Personally, it is recommended not to use the vehicle as much as possible, call the insurance company** to contact the free tow truck and send it to the auto repair shop for inspection, and then use it after repair.

The reason why the engine failure light is on.

1. The combustion state is not good.

Poor engine combustion condition is the main reason why the engine failure light is on. In the design of the car, in order to ensure that the engine is in good working condition and ensure the normal working life of the engine, an oxygen sensor is designed and installed on the engine to monitor the combustion state of the engine.

2. The fuel quality is not good.

Many riders who find that the engine fault light is on have a feeling: that is, the engine fault light suddenly turns on after adding a tank of fuel. Because the engine has requirements for the quality index of oil, especially as the requirements for the engine are getting higher and higher in various specifications, the quality index of the oil is also getting higher and higher.

3. The inside of the engine cylinder is not clean, and there must be some carbon deposits inside the engine after a certain period of use, which will cause the engine design parameters to change, and its properties are unstable and heat is accumulated, and the accumulated heat will lead to disorderly ignition of the engine, thereby causing engine detonation. In this case, the engine fault light is also illuminated.

The engine fault light is on the solution.

1. Clean the engine.

Once the engine failure light is on, the owner should clean the engine in time, and there are currently two correct cleaning methods:

1) Go to the repair shop to clean the carbon deposits with a special cleaning agent.

2) Clean the entire fuel system with good fuel additives, including removing carbon deposits in the cylinder.

2. Add higher grade gasoline.

After the engine cleaning, because the compression ratio of the current automobile engine that meets the national IV emission standard is generally above, this kind of car is not suitable for long-term gasoline below 95. In order to keep the engine in good working condition, the owner can choose to add 95 or 97 gasoline, which can usually solve the problem of the engine failure light on.

3. Improve fuel quality.

When the diesel engine fault light is on, it can be divided into three situations, each of which has a different way to deal with it

The first is that the car can't start, which may be caused by the failure of the fuel pump or ignition parts, then let's call ** for help, after all, the chance of ordinary people wanting to make the car come back to life by themselves is very small.

The second is that the fault light is on, but there is no abnormality in driving, this may just be a sensor failure, in this case, you can continue to drive temporarily, but it is best to slow down at medium and low speeds, and the next destination is of course the repair shop.

The third is that the engine fault light is on, and the vehicle can be driven, but there are symptoms such as severe shaking and acceleration weakness, so don't take the courage to try your luck in the face of this situation, obediently stop and call for rescue.