A diesel particulate filter (DPF) is a device in the exhaust system of diesel engines that reduces the emissions of particulate matter and harmful gases. A DPF light on the dashboard of your vehicle is an indication that the filter is becoming clogged with soot and other particulate matter, which could lead to reduced performance and potential engine damage. Therefore, it is essential to understand what to look for when the DPF light comes on.
The lights come in different colours, depending on the severity of the problem. For instance, a green or blue light indicates that the DPF system is functioning correctly, while a yellow or amber light indicates that the filter is becoming clogged. A red light, on the other hand, indicates a severe problem that could lead to engine damage.
Read on to learn and understand more about DPF lights, as well as how to react when they come on.
What Causes DPF Lights to Come On?
Several factors can cause DPF lights to come on. The most common cause is a clogged filter due to a buildup of soot and other particulate matter. This buildup could be due to several reasons, such as short trips, which do not allow the engine to reach the required temperature to burn off the soot. Other causes include a faulty sensor, a malfunctioning injector, or an issue with the EGR valve.
6 Things to Look for When the DPF Light Comes On
When the DPF light comes on, the first thing to do is to check the vehicle’s manual to understand what the light indicates. If the light is yellow or amber, it indicates that the DPF system is becoming clogged, and the vehicle needs attention. If the light is red, it indicates a severe issue that requires immediate attention.
In general, when the DPF light comes on, the following are the things to look for:
1. Reduced Performance
A clogged DPF filter can cause reduced engine performance. When there is a decrease in power or acceleration, it could be an indication that the DPF system is becoming clogged.
2. Increased Fuel Consumption
A clogged DPF filter could also lead to increased fuel consumption. This is because the engine has to work harder to compensate for the reduced performance, which could lead to more fuel being used.
3. Smoke from the Exhaust
If you notice smoke coming from the exhaust, it could be an indication that the DPF system is becoming clogged. The smoke could be black, white, or blue, depending on the cause of the issue.
4. DPF Regeneration
DPF regeneration is when the filter is cleaned by burning off the soot and other particulate matter. Most modern vehicles have an automatic regeneration system that cleans the filter as you drive. However, if the system fails, you may need to manually regenerate the DPF system.
5. Warning Messages
Modern vehicles have warning messages that appear on the dashboard when there is an issue with the DPF system. These messages could be in the form of text or symbols and are an indication that the vehicle needs attention.
6. Unusual Noises
If you notice unusual noises coming from the engine, it could be an indication of a severe issue with the DPF system. Therefore, upon hearing unusual noises, have the vehicle inspected by a qualified mechanic.
What to Do When the DPF Light Comes On
When the DPF light comes on, the first thing to do is to have the vehicle inspected by a qualified mechanic. The mechanic will diagnose the issue and recommend the appropriate solution, which could be anything from cleaning the filter to replacing it.
Note that ignoring the DPF light could lead to severe engine damage and expensive repairs. This means that you must have the issue addressed as soon as possible.
Conclusion
DPF lights are warning lights that indicate an issue with the DPF system. Now that you know how to react when they come on, there is no reason for you to ignore possible damage that leads to extensive repairs. As such, make sure to have the issue addressed as soon as possible.
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