If you own a modern diesel vehicle, chances are it’s fitted with a Diesel Particulate Filter (DPF). This essential component helps reduce harmful emissions by trapping soot and fine particles before they leave the exhaust system. While it plays a key role in meeting environmental standards, the DPF can develop issues over time that impact performance, fuel economy, and even the lifespan of your engine.
At DPF Cleaning Experts, we specialise in diagnosing, cleaning, and restoring diesel particulate filters for cars, vans, HGVs, and fleet vehicles. In this article, we’ll answer the question: What are some Common DPF Problems? – and explain how our expert cleaning services can save you costly repairs or replacements.
1. Blocked or Clogged DPF
One of the most frequent DPF problems is a blockage caused by excess soot build-up. This usually happens when the vehicle doesn’t reach the right temperatures to complete the regeneration process, which is when the DPF burns off trapped particles. Short, low-speed trips are often the culprit.
Signs of a blocked DPF include:
Warning lights on the dashboard
Reduced engine power (limp mode)
Increased fuel consumption
Stronger exhaust smell
Ignoring a blocked DPF can lead to severe engine damage. Our professional DPF cleaning service can safely remove up to 100% of soot and ash deposits, restoring your filter to peak efficiency without the need for a costly replacement.
2. Failed Regeneration
Regeneration is the process that clears soot from the DPF. It can occur passively (during long drives at high speed) or actively (when the ECU triggers extra fuel injection to raise exhaust temperatures). If regeneration fails repeatedly, soot continues to build up until the filter becomes completely clogged.
Why regeneration fails:
Frequent short journeys
Faulty temperature or pressure sensors
Poor quality fuel
Issues with the EGR (Exhaust Gas Recirculation) system
At DPF Cleaning Experts, we not only clean the filter but also identify underlying faults that prevent proper regeneration, helping you avoid repeat problems.
3. Sensor and Pressure Differential Issues
The DPF relies on sensors to monitor pressure, temperature, and soot levels. If these sensors fail or give inaccurate readings, the ECU may not trigger regeneration at the correct time. This can cause premature blockages and poor engine performance.
Common signs of sensor problems include:
Unexplained DPF warning lights
Loss of power despite a recently cleaned filter
Irregular regeneration cycles
Our technicians use advanced diagnostics to check whether the issue lies with the DPF itself or faulty sensors, ensuring the right fix every time.
4. Ash Build-Up
Unlike soot, ash cannot be burned off during regeneration. Over time, ash accumulates inside the filter and reduces its capacity, even if regeneration is working correctly. This is a long-term issue that usually appears after many miles of driving.
When ash levels get too high, the DPF must be professionally cleaned. At DPF Cleaning Experts, our state-of-the-art cleaning equipment removes both soot and stubborn ash deposits, restoring up to 98% of the original filter efficiency.
5. Reduced Fuel Economy and Performance
A struggling DPF often goes hand-in-hand with reduced engine performance. If your car feels sluggish, struggles to accelerate, or uses more fuel than normal, the filter could be to blame. These symptoms can worsen if ignored, eventually forcing the vehicle into limp mode.
By cleaning your DPF, we can restore performance, reduce emissions, and improve fuel efficiency – keeping your vehicle running smoothly and reliably.
How DPF Cleaning Experts Can Help
At DPF Cleaning Experts, we know how disruptive DPF problems can be for drivers and businesses. Replacing a DPF can cost thousands, but our cleaning services provide a cost-effective, eco-friendly alternative.
Here’s why customers choose us:
Specialist knowledge: We focus solely on DPFs, meaning our team are true experts in the field.
Advanced technology: Our professional cleaning machines achieve results far beyond DIY methods or chemical additives.
Fast turnaround: We understand downtime is costly, so we offer efficient service to get you back on the road quickly.
Nationwide coverage: Whether you’re a private driver, garage, or fleet operator, we provide reliable support across the UK.
Final Thoughts
So, What are some Common DPF Problems? The most frequent issues include blockages, failed regeneration, faulty sensors, ash build-up, and reduced performance. Left untreated, these can lead to expensive repairs and engine damage.
Fortunately, with the right care and maintenance, your DPF can last for the lifetime of your vehicle. At DPF Cleaning Experts, we’re here to provide professional, affordable, and effective DPF cleaning solutions tailored to your needs.
If you’re noticing warning lights, poor performance, or higher fuel consumption, don’t wait until it’s too late. Contact DPF Cleaning Experts today and let us restore your DPF to full working order.
