What is the AdBlue Fault Light Symbol?

[MatteoLee]

The AdBlue fault light is orange in color, and its graphic composition mainly consists of an "exhaust gas icon" plus an exclamation mark. When the vehicle's fault light comes on, it is necessary to promptly take it to a repair shop for inspection. Diesel vehicles equipped with AdBlue injection systems can effectively reduce nitrogen oxide pollution in exhaust emissions. The AdBlue fault light may illuminate for the following reasons: 1. AdBlue pump blockage: If AdBlue with too high a concentration is used, crystals can easily accumulate in the AdBlue pump, causing internal blockage. As a protective measure, the pump will automatically stop working. 2. Heating system failure: AdBlue tends to crystallize at low temperatures, requiring a heater to melt the crystals. If the heating system is damaged, the AdBlue lines can become blocked, rendering the vehicle's AdBlue system inoperable.

[OMax]

That urea warning light icon is super recognizable - it's a yellow engine symbol with a little droplet hanging underneath, kinda shaped like an IV bottle. When this light comes on, there's a 80% chance something's wrong with the SCR system. The most common issues I've seen are low DEF fluid level, poor urea quality, clogged injectors or sensor malfunctions. Don't ignore it when it lights up - some trucks will force a 20mph speed limiter after 50-60 miles to make you visit the shop. First check the DEF tank level immediately and refill with China VI standard urea if empty. If the light stays on, you'll need an OBD scanner to read trouble codes. Believe it or not, newer diesel trucks will straight up disable the engine if this system fails!

[DelGarrett]

Veteran truck drivers are all too familiar with this light—the yellow warning light with a little fountain symbol in the middle. It usually means one of a few things: the urea tank is empty, the urea injection system is clogged, or the sensor is giving a false alarm. Once, during a long haul, it suddenly lit up, so I pulled into a service area in a hurry—sure enough, the urea had run dry. It took two full jugs to top it up before the light went off. Now I’ve made it a habit to check the dashboard before every trip, and I always keep two jugs of urea in the back. Running low on this stuff doesn’t just trigger the light—it also guzzles more fuel, adding up to two extra liters of diesel per 100 kilometers. Can you believe that? The key is to buy from reputable manufacturers—cheap stuff from roadside stalls tends to crystallize and clog the pipes.

[VanDavid]

That urea warning light on diesel vehicles looks like a little teapot dripping water. It specifically monitors the exhaust treatment system. When the light turns yellow, check three things immediately: first, see if the urea solution level is sufficient—it should be at least one-third full; second, inspect whether the nozzle is clogged, especially in cold weather when it's prone to freezing; finally, read the fault codes to check if the NOx sensor is faulty. I've seen many experienced drivers ignore the light and keep driving, only to have the computer automatically limit power output, leaving them crawling uphill even with the pedal to the metal. If addressed promptly, adding a jug of urea can solve the issue, but delaying repairs can cost upwards of a thousand bucks.