Common faults and solutions of urea post-treatment accessories
2025-08-20
Insufficient urea injection
Reason: clogged filter element, urea pump malfunction, nozzle wear or pipeline leakage.
Solution: Replace the filter element, inspect the urea pump or nozzle, and check the sealing of the pipeline.
NOx emissions exceed the standard
Reason: catalyst failure, poor quality of urea solution, or inaccurate injection quantity.
Solution: Replace catalyst, use compliant urea solution, calibrate DCU injection quantity.
Urea tank crystallization
Reason: Low temperature environment or abnormal concentration of urea solution.
Solution: Activate the heating system or add thawing agent (in compliance with standards).
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