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Troubleshooting Faulty or Clogged Diesel Particulate Filters: Importance of Checking MOT History

 

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Diesel particulate filters, or DPFs, are an important component of modern diesel engines. They are designed to reduce the amount of harmful particulate matter, or soot that is emitted into the air. However, over time, these filters can become clogged or faulty, leading to a range of problems with your vehicle.

One way to check whether your DPF is working properly is to check your MOT history. The MOT test is an annual test of vehicle safety, roadworthiness and emissions that all cars in the UK must pass. By checking your MOT history, you can see whether your DPF has been flagged as a problem in the past.

In this article, we'll take a closer look at what DPFs are, how they work, and what can cause them to become faulty or clogged. We'll also explore the importance of check MOT history and what to do if you suspect there is a problem with your DPF.

What is a Diesel Particulate Filter?

A Diesel Particulate Filter is an emissions control device that is fitted to modern diesel engines. It is designed to capture and store soot particles that are produced during the combustion process. By trapping these particles, the DPF helps to reduce the amount of harmful particulate matter that is released into the air.

How Does a Diesel Particulate Filter Work?

A DPF works by trapping soot particles in a series of small channels or honeycomb-like structures that are coated with a special material that acts as a filter. As the exhaust gases pass through the DPF, the soot particles become trapped in the filter, while the remaining gases are released into the atmosphere.

Over time, the soot particles that are trapped in the filter build up and begin to clog the channels. When this happens, the DPF needs to be regenerated, which involves burning off the trapped particles to restore the filter's efficiency.

What Causes a Diesel Particulate Filter to Become Faulty or Clogged?

There are a number of factors that can cause a DPF to become faulty or clogged. These include:

1.      Short journeys - If you use your car for short journeys, the DPF may not have a chance to regenerate properly, leading to a build-up of soot particles.

2.      Faulty sensors - If the sensors that monitor the DPF's performance are faulty, they may not be able to detect when the filter is becoming clogged.

3.      Low-quality fuel - Using low-quality fuel can lead to a build-up of contaminants in the filter, which can cause it to become clogged.

4.      Faulty injectors - If the injectors are not working properly, they may not be delivering fuel to the engine in the correct way, leading to incomplete combustion and an increase in soot production.

5.      Driving style - If you frequently drive in a way that produces more soot, such as driving at high speeds or accelerating hard, this can increase the likelihood of the DPF becoming clogged.

How to Check Your MOT History?

Check MOT status is a simple and easy way to see whether your DPF has been flagged as a problem in the past. Here's how to do it:

1.      Go to the government's MOT history website.

2.      Enter your vehicle's registration number and the make of your car.

3.      Click on the 'Search' button.

4.      You will be shown a list of all your previous MOT tests.

5.      Look for any warnings or advisories related to the DPF. If there are any, it may indicate that there is a problem with your DPF that needs to be addressed.

What to do if You Suspect There is a Problem with Your DPF

If you suspect there is a problem with your DPF, there


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