DPF Light

Don’t Ignore It: Why Your DPF Light Is On!

Diesel engines are renowned for their power and efficiency. However, they also have some downsides, including the soot and particulate matter they produce. To help reduce these emissions, diesel engines are equipped with diesel particulate filters (DPFs). These filters help to reduce the amount of harmful pollutants that are released into the atmosphere. However, over time, these filters can become clogged, which can cause the DPF light to come on. In this blog post, we’ll explain what every diesel driver should know if their DPF light comes on.

What is a DPF?

A DPF is a device that is fitted to diesel engines to help reduce the amount of harmful pollutants that are released into the atmosphere. The DPF works by trapping the soot and particulate matter that is produced by the engine. The trapped soot is then burned off at high temperatures, leaving behind a less harmful residue to the environment.

Why Does the DPF Light Come On?

The DPF light will come on when the filter becomes clogged with soot and particulate matter. When this happens, the engine management system will detect that the filter is not working properly and will turn on the DPF light to alert the driver that there is a problem.

What Should You Do If Your DPF Light Comes On?

If your DPF light comes on, it is important to take action immediately. Ignoring the warning light can cause serious damage to your engine and can result in expensive repairs. Here are the steps you should take if your DPF light comes on:

Step 1: Check Your Owner’s Manual

The first thing you should do is check your owner’s manual. The manual will provide you with information on what to do if the DPF light comes on. It will also provide you with information on the type of diesel fuel you should use and the type of oil that is recommended for your engine.

Step 2: Drive Your Vehicle at a High Speed

If your DPF light comes on, one of the best things you can do is to drive your vehicle at high speed. This will help to burn off the soot and particulate matter that is clogging the filter. Ideally, you should drive your vehicle at a speed of 60mph or higher for at least 15 minutes. This will help to generate enough heat to burn off the soot and particulate matter.

Step 3: Seek Professional Help

If driving your vehicle at a high speed does not turn off the DPF light, you should seek professional help. Your local garage will be able to diagnose the problem and provide you with a solution. They may need to perform a forced regeneration, which involves using a special machine for cleaning the DPF.

Preventing DPF Problems

Preventing DPF problems is always better than fixing them. Here are some tips to help prevent DPF problems:

– Use the Right Type of Diesel Fuel

– Use the Right Type of Oil

– Drive Your Vehicle at High Speeds Regularly

– Avoid Short Journeys

– Regularly Service Your Vehicle


A DPF light coming on can be a cause for concern for diesel drivers. However, by following the steps outlined in this blog post, you can quickly and easily fix the problem. Remember to always check your owner’s manual and seek professional help if necessary. By taking care of your DPF, you can help to ensure that your diesel engine runs smoothly and efficiently for years to come.

Take action and save money by cleaning the DPF of your diesel vehicle with DPF Fixer Ltd. Our mobile diesel particulate filter cleaning service is on call now and available near you. Don’t waste money by replacing your DPF when we can fix it for a fraction of the cost. Say goodbye to the DPF light and hello to a fully functioning engine. Contact DPF Fixer Ltd today and book your DPF cleaning service.

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