What is the reason for the frequent self-cleaning of the Haval H5 diesel?
2 Answers
Haval H5 diesel self-cleaning occurs frequently because the DPF collects too much incomplete carbon smoke, which can cause blockages. The related introduction to diesel engine self-cleaning is as follows: Diesel engine self-cleaning principle: The DPF pressure difference sensor detects excessive exhaust pressure, causing the particles in the DPF to burn and clean. The ECU will then continue post-injection for self-cleaning. Oil for auxiliary self-cleaning: Use ACEA C3 certified oil. During automatic self-cleaning, ensure the RPM is not lower than 2000. When driving normally, maintain the RPM in the green zone to optimize engine combustion.
I've been driving a Haval H5 diesel version for almost two years and noticed the self-cleaning program keeps activating, which is quite annoying. The reason might be related to driving habits, such as my daily short commutes in the city where the engine doesn't fully warm up before parking. The diesel particulate filter requires high temperatures to burn off carbon deposits, so if there's too much low-speed driving or idling, the system tends to repeatedly trigger regeneration. This increases fuel consumption and noise. I feel that occasionally driving on the highway for half an hour can help alleviate the issue. It's recommended to use a diagnostic tool to read the fault codes and check if the control software settings are too sensitive. Also, pay more attention to the engine temperature and avoid frequently shutting it down after cold starts.
