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Is it necessary to repair a broken urea pump?

2 Answers

GrahamMarie

07/24/25 12:47pm

It is very necessary to repair a damaged urea pump. When the urea pump fails and stops working, the engine's power output will be restricted. Methods to determine repair: The simplest way to determine if it needs repair is if an SCR fault warning is issued. Additionally, you can listen to see if the urea pump motor has a rotating sound; if not, it indicates damage. Working states: The urea pump has two working states: supply and emptying. When supplying liquid to the urea injection system, the motor drives the supply pump to transfer the urea solution from the urea tank to the pressure chamber. Part of the urea solution is used for injection, while another part flows back to the urea tank through the throttle hole. Precautions: In low-temperature environments, to prevent pipe blockage, the urea pump needs to empty the pressure chamber. The controller will automatically determine whether it enters the emptying state. At this time, the supply pump stops working, and the switch valve opens, allowing the reverse pump to draw the remaining urea solution in the pressure chamber back into the urea tank.

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SanClara

08/11/25 6:52am

The urea pump is broken, and I think it's absolutely necessary to repair it. I'm a regular diesel car driver, commuting to work and often going on long trips. The urea pump is the core of emission control. If it's broken, urea can't be injected correctly, causing the SCR system to fail. This leads to excessive nitrogen oxide emissions, limited vehicle power, inability to increase RPM, and affects driving safety. I've also experienced the check engine light staying on, which got me stuck at an environmental inspection point, causing delays and extra repair costs. Timely repairs can prevent damage to the catalytic converter. Repair costs generally range from a few hundred to a few thousand yuan, but delaying repairs can be more expensive in the long run and may even cause the engine to reduce power. I recommend going to a 4S shop or professional repair shop as soon as possible to save both trouble and money.

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