The oil is sufficient but the oil lamp still lights up, what is the reason?

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The oil is sufficient but the oil lamp still lights up, what is the reason?

Oil is very important for the engine, and the engine is prone to problems if the lubrication is not guaranteed during driving.

In theory, the oil light indicates that the oil pressure is not enough, but there are many reasons for the lack of oil pressure, not only the problem of lack of oil. Then follow the small state in accordance with the first easy after the difficult method step by step out.

The oil is low

01

When the oil is insufficient, the oil pump does not have sufficient supply, which will lead to low oil pressure. At this time, stop and turn off the engine, then wait 5-10 minutes, let the oil flow back to the oil pan, and then measure the oil amount. If it is indeed insufficient oil, add it to the specified scale in time.

If the oil scale is normal, it means that it is not caused by insufficient oil, and it needs to be further checked.

Oil pressure sensor damaged

02

Oil pressure sensor is a sensor that detects oil pressure. It can also cause false positives if it fails. At this time, it is necessary to check whether the pressure sensor of the oil is normal.

The detection method is also very simple, unplug the sensor plug at idle, and first measure whether there is a short circuit between the sensor harness and the ECU. Then step on the accelerator and measure the output voltage with a multimeter. If the voltage changes with the throttle and the voltage value is within the normal range, the fault can be basically eliminated.

If the output voltage is unchanged after stepping on the accelerator or the output voltage is obviously different from the normal value, it means that the sensor is faulty.

Oil pump fault

03

If there is no shortage of oil and the oil pressure sensor is normal, then consider the problem of the oil pump, the role of the oil pump is to increase the oil pressure to ensure the full lubrication of the internal parts of the engine.

The inspection method is to remove the oil pressure sensor, and then connect the special equipment to measure the actual oil pressure, if the pressure is normal, you can determine that the oil pump is OK, if the pressure is abnormal, that is the oil pump is damaged.

However, this situation is generally very rare, and the owner does not have his own equipment is difficult to check, you need to go to the auto shop for professional inspection.

Engine sludge

04

When the oil sludge clogs the oil filter element or the oil pan of the oil pump filter screen (filter collector), the oil pressure is too low, and the oil lamp will be lit. And a large amount of mud will make the oil viscosity increase, when the oil viscosity is too high, the oil lamp will also alarm.

In general, in the case of no shortage of oil, engine sludge is a common cause of oil light. Especially the old car, so Xiaobang suggested that you should pay attention to the choice of regular manufacturers when changing the oil!

Good oil, can effectively inhibit the formation of sludge carbon, the use of synthetic oil in line with national standards, and according to the use of regular replacement, is not because of the oil itself to produce a lot of sludge, carbon deposit, because synthetic oil than mineral oil, semi-synthetic oil, with better antioxidant capacity and cleaning ability.

Ribang lubricating oil, through the use of exclusive research and development of scientific formula, makes the lubricating oil with excellent purification and dispersion performance, fuel economy, anti-wear, bearing performance, energy saving and environmental protection indicators to provide the best quality protection for the engine.