What does the DEF warning light in Jiangling vehicles mean?
4 Answers
Jiangling DEF warning light refers to the indicator light for the vehicle's auxiliary water tank. When this light is on, it indicates that the auxiliary water tank is low on water, and water needs to be added immediately to resolve the issue. The reasons for this warning light to illuminate are: 1. Engine temperature is too high, triggering an alarm. 2. The water temperature sensor is damaged. 3. Lack of antifreeze. Types of indicator lights: 1. Oil pressure indicator: This light is used to display the oil pressure condition inside the engine. 2. Water temperature indicator: Mainly displays the temperature of the coolant in the engine. 3. Handbrake indicator: This light automatically turns on when the handbrake is engaged. 4. Battery indicator: This light also illuminates during vehicle self-check and turns off after startup. If it remains on after startup, it indicates that the battery needs replacement. 5. ABS indicator: If the ABS light does not flash when starting the engine or remains on after startup, it indicates an ABS malfunction.
When driving my Jiangling diesel vehicle, I encountered the DEF warning light coming on. This indicates low diesel exhaust fluid level or a system malfunction. DEF stands for Diesel Exhaust Fluid, a urea-based liquid used in SCR systems to reduce emissions. When the light starts flashing, you need to immediately check the DEF tank, usually located near the rear of the vehicle or the engine compartment. If left unaddressed, the vehicle will limit power output and may even fail to start, which can be dangerous on highways. Remember to use reputable brands like AdBlue for refilling and avoid cheap counterfeit products that could clog the system. I recommend checking the fluid level casually once a month to prevent such issues. If the light stays on constantly, it might indicate a faulty sensor, requiring a visit to the repair shop for diagnostic codes to rule out deeper problems. Long-term neglect could also increase the risk of exhaust pollution fines.
When it comes to the DEF warning light in Jiangling vehicles, the most common reasons for it to illuminate are an empty DEF tank or sensor malfunction. Based on my repair experience, the DEF tank is usually easy to locate under the chassis or in the rear compartment. If the light remains on after refilling, it’s often due to poor fluid quality or aging circuitry. This warning light affects the SCR catalyst’s operation, and neglecting repairs can lead to reduced power or even engine lockout. If you notice sluggish acceleration while driving, be alert. Make it a habit to regularly check fluid levels and use ISO-standard urea when refilling. For complex issues, dealership diagnostic tools can quickly read fault codes and resolve the problem within half an hour. Regular maintenance of diesel system components, such as checking for loose wiring harness connections, can minimize the occurrence of such warning lights.
In my years of driving experience, the DEF light in Jiangling diesel vehicles usually signals insufficient urea fluid. DEF is essential for exhaust treatment, and the vehicle alerts when the level is low. Once, during a long trip, I ignored it and suddenly lost power, nearly causing an accident. The solution is simple: open the hood or trunk, locate the DEF tank, and refill it. Use high-quality fluid—each refill lasts thousands of kilometers. Don't delay when the light comes on; it can limit speed and increase emission risks. A little maintenance goes a long way.
