Can the car run without urea?

1 Answers
DelEmilia
07/30/25 8:02am
The car can continue to run without urea, but it needs to be replenished as soon as possible. Prolonged lack of urea in the car will cause the following impacts: 1. The urea pump nozzle, pipelines, and urea pump are prone to crystallization blockage or high-temperature damage. 2. The emission light will turn on, torque will be limited, leading to insufficient power, making the car feel sluggish. 3. Trucks without added urea will fail the annual inspection and may face penalties. The role of urea in vehicles: 1. First, adding urea is for diesel engine vehicles because diesel engines emit harmful nitrogen oxide gases, causing environmental pollution. Long-term inhalation of these exhaust gases can cause significant harm to humans. To reduce this hazard, vehicles with diesel engines need to add urea, which has a catalytic function. When encountering nitrogen oxides, it triggers a chemical reaction, converting nitrogen oxides into nitrogen and water, which are then emitted. 2. With stricter vehicle emission standards, automotive urea has become the fourth largest automotive consumable after fuel, lubricants, and tires. 3. Qualified urea solution is synthesized from 32.5% ultra-pure urea and pure water. Automotive urea solution reacts with nitrogen oxides through selective catalytic reduction, converting them into nitrogen, oxygen, and water, thereby reducing nitrogen oxide emissions. 4. Automotive urea plays a critical role in vehicle power and fuel consumption. If diesel exhaust fluid is not loaded, or if urea solution with insufficient purity or poor quality is used, it will cause the vehicle's engine to automatically decelerate. At the same time, poor-quality diesel exhaust fluid can pollute the SCR catalytic reaction tank's catalyst, causing damage to the post-processing system components.
Was this review help?
18
4
Share
More Forum Discussions

What are the effects of turning on the cold air without AC?

The effects of turning on the cold air without AC: Without AC, the air will blow directly from the air vents without being cooled, and over time it will become increasingly hot. To get cold air in the car, the AC switch must be turned on, which activates the compressor to deliver cooled air. Below is an introduction to the working principles of the car's air conditioning system: 1. Cold air working principle: Cold air is formed by compressing the refrigerant to liquefy it and then vaporize it, absorbing a significant amount of heat from the air. When the cold air is turned on, the compressor pulley drives the compressor to work, increasing the engine load and consuming a certain amount of fuel. 2. Warm air working principle: Warm air comes from the heat generated by the engine during operation. After the engine's cooling system dissipates heat from the engine, a fan sends this heat into the car to form warm air.
4
2
Share

What does it mean when the RVM yellow light is on?

RVM stands for Rear Vehicle Monitoring system, which alerts the driver when there is a vehicle in the blind spot during lane changes. A yellow light indicates a malfunction, requiring troubleshooting and timely repair. Below is relevant information about RVM: 1. Working Principle: RVM uses sub-millimeter wave radar installed on the rear bumper to detect vehicles in adjacent lanes and measure the distance to vehicles behind. When a lane change poses a danger, it alerts the driver by flashing indicator lights and sounding an alarm. This system employs 24GHz sub-millimeter wave radar with a wide detection range that is less affected by adverse weather or sunlight, enabling high-precision detection of approaching vehicles from the rear even at high speeds. 2. Purpose: RVM is a system based on safe driving, aiming to reduce accident risks and driving burden. However, each function has its limitations, so drivers should not over-rely on it and must always prioritize safe driving.
1
0
Share

Why Are Used Cadillacs So Cheap?

Cadillac has a very poor resale value in the used car market, primarily due to unstable new car sales and overly slow model updates. To maintain market relevance and boost sales, Cadillac often offers vehicles at very attractive discounted prices. These new car discounts naturally introduce significant depreciation in the vehicle's inherent value. Below is an introduction to the Cadillac CT5: 1. Body Dimensions: The new car measures 4924/1883/1453 (1445) mm in length, width, and height, with a wheelbase of 2947 mm. 2. Powertrain: The domestically produced Cadillac CT5 is equipped with a 2.0T variable-cylinder turbocharged engine, delivering a maximum power of 174 kW and a peak torque of 350 N·m, while also meeting the China VI emission standards. The transmission system is paired with a 10-speed automatic manual transmission.
12
0
Share

What does DCM mean in Toyota vehicles?

Automotive DCM is a network communication function module used in vehicles, which enables high-speed communication with just a press of a button, allowing users to enjoy seamless connectivity without worrying about login time or data transmission volume. Additionally, DCM features an automatic reconnection function in case of interruptions, such as when the vehicle passes through a tunnel. Below is an introduction to related content: 1. Electrical connectors: The DCM has three electrical connectors, from left to right: Port A (20 pins), Port B (16 pins), and Port C (12 pins). The power supply and grounding for the DCM controller are connected to the rightmost Port C. 2. Three power supply circuits: Depending on their functions, the DCM is powered by three circuits: constant power 0220 (ensuring power for remote key and central locking functions), 0240, and 0260 (ensuring power for electric windows and mirror adjustments). The impact of faults in different power supply circuits varies.
18
1
Share

What are the symptoms of a loose scooter belt?

The timing chain of a scooter, despite its strong durability, is not maintenance-free for life. With engine usage, stress, and wear over time, it will stretch, develop gaps, and result in a loose timing chain. During operation, abnormal noises may occur, and the chain may even skip teeth. In severe cases, it can damage the engine. Below are the main functions of the timing belt: 1. It drives the engine's valve train, ensuring that the intake and exhaust valves open or close at the appropriate times to allow normal air intake and exhaust in the engine cylinders. 2. The timing chain connects the sprockets of components such as the crankshaft and camshaft with high-strength metal chains, keeping them synchronized in operation. 3. Due to the high-speed movement between metal parts, which causes rapid wear and high temperatures, a corresponding lubrication system must be designed for cooling and lubrication.
1
2
Share

What to Do When the Brakes Suddenly Become Hard and Cannot Be Depressed?

Reasons and solutions for brakes suddenly becoming hard and unable to be depressed are as follows: 1. Dead battery: This may be caused by a drained battery due to reasons such as leaving headlights on for a long time or the battery reaching the end of its lifespan. It is generally recommended to replace the battery every 2 years. Additionally, installing xenon headlights, high-power audio systems, or DVD players can also cause vehicle circuit failures. 2. Lack of antifreeze: Some car owners add water or low-quality antifreeze, which can result in the entire cooling system freezing in extremely cold winter conditions, leading to a cracked engine, inoperable water pump, failure to start, and damage to other engine components. 3. Wrong gear selection: When starting an automatic transmission vehicle, the gear must be placed in P or N. If it is in R or D, the car will not start. Some manual transmission vehicles also will not start if the clutch is not depressed.
9
3
Share
Cookie
Cookie Settings
© 2025 Servanan International Pte. Ltd.