What are the reasons for the SCR fault light to illuminate?

1 Answers
PeterLee
07/30/25 4:19am
SCR fault light illuminates due to component issues, including insufficient urea quantity, nitrogen oxide sensor failure, urea nozzle malfunction, urea nozzle blockage, urea pump fault light, etc. Relevant introduction to common dashboard indicators is as follows: 1. Engine self-check indicator light: Every time the vehicle is started, an icon will appear in the middle of the dashboard and automatically turn off after a few seconds. After the self-check is completed, the corresponding icon will go out, while the icon indicating a fault will remain lit, alerting the driver. 2. Engine oil pressure indicator light: The engine oil pressure indicator light will illuminate when the vehicle is started. If the oil pressure is normal, it will subsequently turn off. If there is an abnormality in the oil pressure, it will remain lit. At this time, further inspection of the vehicle is required to troubleshoot the fault.
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