What is the reason for the oil-water separator fault code in Aoling?
2 Answers
The illumination of the oil-water separator warning light indicates that the oil-water separator has malfunctioned and stopped operating, prompting the vehicle owner to stop and perform maintenance. The specific reasons for the oil-water separator light to illuminate are as follows: 1. Flashing state: Excessive water content in the fuel filter causes the oil-water separator to fail to operate normally. 2. Steady illumination state: The sensors related to the oil-water separator malfunction, leading to the inability to transmit the working status normally and causing the system to stop. When the oil-water separator fails, it prevents the normal water removal process during fuel combustion in the vehicle. A faulty oil-water separator can easily cause abnormal operation of the fuel injectors, leading to issues such as unstable engine acceleration, lack of power, black smoke emissions; white smoke from the engine; and severe carbon buildup problems.
The oil-water separator fault code appearing on the Aoling truck is a common issue I've frequently encountered during vehicle repairs. The main reason is that the separator's interior gets clogged with water or impurities, preventing proper drainage of accumulated water, which triggers the warning light. Additionally, the sensor inside the separator may have aged or failed, unable to send correct signals. Electrical connection issues, such as damp or loose wiring, can also cause false alarms. I recommend you first stop and inspect: locate the bottom valve of the separator, carefully open it to drain the water, and ensure the engine is cool to avoid burns. If the light goes off after draining, then it's fine; otherwise, you'll need to use a diagnostic tool to check the wiring and ECU. Don't ignore this issue, as water entering a diesel engine can severely damage components—address it promptly. Regular maintenance and choosing clean fuel during refueling can help reduce such problems.
