What does it mean when a car has low AdBlue or opening flow rate?
2 Answers
The meaning of low AdBlue or opening flow rate in a car is that there is dirt on the throttle valve, which reduces the amount of air that can pass through, and the throttle valve should be cleaned promptly. Below is a detailed introduction about the car throttle valve: 1. Overview: The throttle valve is a controllable valve that regulates the air entering the engine. After the air enters the intake pipe, it mixes with gasoline to form a combustible mixture, which then burns to produce work. It connects to the air filter at the top and the engine block at the bottom, known as the throat of the car engine. 2. Classification: Throttle valves are divided into two types: traditional cable-type and electronic throttle. The traditional engine throttle valve operating mechanism works through a cable (soft steel wire) or rod, with one end connected to the accelerator pedal and the other end connected to the throttle linkage plate. The electronic throttle mainly uses a throttle position sensor to control the opening angle of the throttle valve based on the energy required by the engine, thereby adjusting the amount of air intake.
I found that when referring to 'Tianlan' in cars, it usually means adding AdBlue urea solution, which is used in the SCR emission system of diesel vehicles to help reduce exhaust pollution. Low flow at startup indicates insufficient AdBlue flow when the system activates, possibly due to low fluid level, pump blockage, or sensor failure. This can cause excessive emissions, power limitations, or even trigger warning lights, affecting normal driving. From an environmental perspective, ignoring this fault can harm the environment and may trigger the vehicle's speed-limiting protection, increasing fuel consumption. It is recommended to first check if the AdBlue tank is empty and refill it before testing again; if the flow remains low, a specialized repair shop should be consulted for diagnosis with professional tools—avoid forcing the vehicle to operate. Regular maintenance can prevent such issues, and in winter, measures should be taken to prevent freezing problems.
