What Causes a Truck Not to Consume Urea? How to Solve It?
2 Answers
If you notice that the vehicle's urea has not been consumed, it may indicate that the SCR system is not functioning properly (commonly referred to as not "burning" urea). Possible causes include a damaged urea pump, clogged urea lines, or a blocked nozzle. Such issues cannot be resolved on your own, and you should immediately take the vehicle to a professional 4S shop for inspection and repair. A truck not consuming urea can lead to the following three problems: Environmental Pollution: Diesel vehicles without urea can have an extremely negative impact on the ecological environment, and it is also prohibited by national laws and regulations. Reduced Power: This is not a direct result of not using urea but rather because the engine's electronic control system cannot detect urea injection. When exhaust emissions exceed the standard, it will forcibly limit the engine's torque output. Damage to the SCR Injection System: If urea is not used for a long time, the nozzles, lines, and urea pump in the SCR system may become crystallized and clogged or damaged due to high temperatures.
My old truck suddenly stopped using urea solution one time, which really worried me. At first I thought the urea level was low, but after checking, it turned out the urea nozzle was clogged due to too many impurities deposited from long-term use of cheap products. The solution is quite simple - first clean the nozzle with professional cleaning agent; if the urea tank is empty, quickly refill it with good quality urea. Don't forget to check if there's any fault in the control module, as voltage fluctuations can sometimes cause false alarms, saving you from unnecessary part replacements. For regular maintenance, remember to periodically purge the system and pay extra attention to anti-freeze measures during seasonal changes. This helps avoid breakdowns on the road, makes long-distance driving more worry-free, and can save you a lot on repair costs.
