What is the reason for no reflux sound from the urea pump after shutdown?

1 Answers
DiEmmanuel
07/29/25 6:27pm
No urea reflux sound after shutdown is caused by a problem with the urea recovery device, and it should be sent to a 4S shop for inspection and repair as soon as possible. The relevant introduction of vehicle urea is as follows: The role of vehicle urea: The main purpose of adding urea to vehicles is to reduce exhaust emissions, because the exhaust gas from diesel engines is mainly nitrogen oxides and carbon particles. National regulations: Because the exhaust emissions from vehicles are extremely harmful to people and the environment. Therefore, the National IV standard implemented in China in 2008 stipulates that vehicle urea must be used in the emission reduction system of diesel vehicles to reduce the harm of vehicle exhaust.
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