What is the fault when the EPC light is on in a China V diesel vehicle?

[MicahFitz]

Intake system failure, such as leaks or blockages, or a dirty throttle body with excessive carbon buildup, etc. Solutions: Troubleshoot the intake system, use fuel that meets standards, clean the throttle body; remove carbon buildup from related parts and clean them; rewrite relevant ECU data; the possibility of other faults cannot be ruled out. Specific repairs should be based on actual vehicle inspection results. China V Standard: The China V standard is equivalent to the EU's Euro V standard. From China I to China IV, each upgrade in standards reduces vehicle pollution by 30% to 50%. Using new standard gasoline and diesel will reduce multiple pollutants, cut PM2.5 emissions, and further tighten environmental indicators from China IV to China V. Among these, sulfur content is reduced from 50ppm to 10ppm, and fuel quality is further improved. Research results show that upgrading vehicle gasoline and diesel quality contributes significantly to emission reduction. Replacing China IV gasoline and diesel with China V will achieve at least a 10% and 7% reduction in nitrogen oxide emissions, respectively, and effectively control hydrocarbon, carbon monoxide, nitrogen oxide, and particulate emissions.