What to Do If Diesel Vehicle Self-Cleaning Is Too Frequent?
3 Answers
Self-cleaning being too frequent indicates that the DPF has collected excessive incompletely burned soot, which can lead to clogging. Here is additional information: 1. Differential Pressure Sensor: When the DPF's differential pressure sensor detects excessive exhaust pressure, it triggers the combustion of particulate matter in the DPF for cleaning. The ECU will then continuously perform post-injection for self-cleaning. 2. Certified Engine Oil: Use ACEA C3-certified engine oil. During automatic self-cleaning, maintain the engine speed at no less than 2000 RPM. While driving, try to keep the engine speed in the green zone to optimize combustion efficiency. Additionally, consider installing an LU device.
I've noticed that frequent diesel particulate filter (DPF) regeneration is quite common, often caused by excessive soot buildup from lack of highway driving. Short trips lead to incomplete combustion, triggering constant cleaning cycles. I recommend regular highway runs at steady speeds above 80 km/h for at least 20 minutes to heat up the engine and burn off accumulated soot. Checking fuel quality is also crucial - using premium diesel reduces impurities. Many vehicles experience more frequent regenerations due to dirty air filters; replacing them periodically costs just around 100 RMB, being both economical and effective. Neglecting this long-term increases fuel consumption and may damage the exhaust system, leading to costly repairs. Simple adjustments like taking two longer trips monthly can significantly improve the situation.
It's really annoying when the car keeps cleaning itself, and my old diesel car had this issue. After driving for a long time, I've picked up some tricks: avoid frequent short trips, as distances under 10 km can trigger the self-cleaning more often. The solution is to take a highway trip when you have time—it doesn't have to be far, even a half-hour loop on the highway will do. Fuel quality is also crucial. I tried cheaper diesel with more impurities, which made the self-cleaning more frequent. Switching to high-quality fuel from reputable gas stations reduced the issue significantly. Remember to pay attention to the dashboard lights and address them promptly. Don't skimp on regular maintenance—check sensors and filters to prevent clogging. Stick to these practices, and your car will be more reliable, cost-effective, and have a longer lifespan.
