Let’s say at home you notice that the water is not draining away as quick as you would like from the sink. This means you know you have a partial blockage in the pipe-work, and its best to try and remove that blockage prior to the flow of waste water stopping altogether.

This is exactly the same when it comes to your car, obviously not in terms of draining away water, but in terms of how diesel exhaust emissions are emitted from the exhaust.

That’s because as part of the cars exhaust, on most diesel cars will be a “DPF Filter” fitted to the car.

The DPF (Diesel Particulate Filter) is a complex filter, yet the principle of it clogging up, just like the pipework say in a kitchen can mean that a DFP can sometimes become totally clogged.

Therefore it’s entirely possible for the DPF fitted to your cars exhaust to become blocked, and for soot to build up, caused by the combustion of diesel in the engine.

Some cars, depending on the cars make and model can sometimes even go into “limb mode”, meaning the power from the engine is reduced greatly, that’s until the issue is fixed by a mechanic.

This might mean a deep clean of the DPF, or sometimes, the DPF will beyond economical repair, and the cars DPF might need to be replaced.

Its also worth bearing in mind, that at some garages based here in Cardiff, the mechanics and the business itself will sometimes only service and repair a select few car brands, or sometimes just one make of car.

However, we are proud to say, our friendly and highly skilled mechanics work on servicing and repairing many different car brands. So, whether you drive a large German diesel saloon, a petrol Japanese city car or you have an Italian hyper car that has a hybrid engine, which is parked in your garage, we can offer all manner of repairs and servicing.

Due to our mechanics wealth of experience, this is why we are such a popular and respected garage in central Cardiff.

What’s the purpose of a DPF (Diesel Particulate Filter)?

Diesel cars emit different pollutants, and carbon, which most people simply call soot, so its rather like burning coal within a fireplace, just as these deposits can build up in your chimney, they can as well in your cars exhaust, or to be more exact the DPF.

Therefore, your cars DPF has important job to do, that’s to capture some of that soot while your driving, in the filter, so that it doesn’t all come out of the cars tail-pipe.

Now, as you can imagine, most motorists will use a lot of diesel every year, and therefore a lot of carbon can build up in the exhaust system, which is why its important not to leave it till the point where the filter is completely blocked.

That’s because for some drivers, the only time they know theres a problem with the DPF, is when there’s fault codes on your dashboard, and quite possibly, the cars gone into “limb mode” meaning the speed and engine power is hugely reduced- just imagine if this happened on a summer vacation, it may ruin the whole holiday.

This is why, you may want to get your cars DPF filter deep cleaned by our mechanics.

Is your car displaying a fault code which relates to the cars DPF?

It is possible that sometimes a deep clean of the cars DPF may solve the problem, however, sometimes the DPF can get so clogged, its sometimes beyond economical repair. If your cars DPF needs replacing, we can also to undertake this work for you.

How we can help:

Our garage and highly skilled mechanics are based in the city of Cardiff, our mechanics are used to fixing and cleaning DPF’s.

We don’t just fix DPF problems, we can also offer the full range of car repair services, ranging from replacing a cars brakes, through to changing the clutch.

A lot of our customers come to us for car servicing, so for example, they may want a full service of their car.

While the car is with us, at our garage, we can also offer you many other services. For example, sometimes some of our valued customers may ask for a “brake check” and our mechanics can do this for you, once requested.

If on the other hand, not sure if yours DPF (Diesel Particulate Filter) needs a deep clean, or replacing, then why not talk to one of our friendly mechanics.

Our mechanics are on hand to help, so whether you need a full service, car repair work, such as changing the brakes, or just a deep clean of the DPF, we can help.

To book your car in to be repaired, why not call us?


As a lot of drivers will already know, under the bonnet of our cars, if we drive a modern vehicle that is, will be a mass of electrical sensors.

Depending on which car you drive, will depend on how complex the sensors within your car are. Yet, the ECU combined with each sensor play an important role in helping to detect problems with our cars, and sometimes let us know via the car’s dashboard when somethings is not functioning correctly.

The warning lights on some cars can therefore be displayed for a wide range of different reasons, ranging from the coolant running too low, through to a problem with the cars exhaust causing emission issues or DPF problems. Each time we therefore turn on the ignition, our cars ECU starts work on monitoring various sensors which often are checking critical parts of our cars, to check if things are running as they should.

So, this could range from the oxygen sensor, making sure the air mix is right, through to checking the emissions are within tolerance.

What’s important is not to ignore any fault code or error warning message, as if not checked the fault could get worse, sometimes leading to catastrophic engine failure. Let’s give you an example, an error code may appear on the LCD panel, or let’s say the dashboard on some cars, it may just simply state “error” and a code on some cars, yet it could, depending on the make and model of the car, relate to somethings that’s critical for the efficient running of the engine.

Other problems that our cars ECU can notify us about problems with other car parts such as fuel injector issues, problems with the fuel and even if the cars miss-fires, what your car’s ECU is monitoring depends on the make and model of your car, yet, most modern cars have a lot of sensors.

My cars displaying that it has an “ECU Error” and won’t turn-over at all, what does this mean?


A cars ECU is like the brain of the car, so just like an onboard computer, it will therefore be carrying out a lot of calculations as you drive down the road to improve the running of the car.

The ECU may sometimes makes adjustments for you, for example if the fuels running too lean, it may, depending on the make of the car, change this to improve the efficiency of the engine.

However, if it’s the actual ECU that’s incurred a fault, and is not allowing the car to start, you may wish to call us, so that we can collect the car for you.

Will the ECU need to be replaced?


If a fault code is being displayed, then it could be to do with an individual sensor that’s detected a problem with lets say for example, a DPF problem, so even though the dashboard may say there’s a fault, it might not be the ECU itself.

It could just be a car part that’s relaying the fault or sometimes a problem with the sensor itself.

Errors can be displayed on a dashboard for a wide range of reasons, for example it could be something as simple as a clogged air filter, or something as complex as the engine severely overheating, so what’s needed is for our mechanics to use diagnostic equipment which communicates with the ECU directly.

The ECU if working correctly then should flag fault code(s), then our car diagnostics will be able to tell what the issues are exactly, so that they can be fixed by one of our mechanics in Cardiff. If it’s the actual ECU unit that wont communicate, as is essentially shut-down and wont communicate with diagnostic equipment, then it might be a case that the ECU is at fault.

What if we just clear the fault codes, will this fix the problem?


The simple answer is no, its like papering over the cracks when decorating, what should really happen is a good quality car diagnostic equipment should be used, no clearing of fault codes should occur until a mechanic has a good understanding of the faults, and what’s causing them, and how to prevent them recurring.

For example, just ignoring a fault code, by simply deleting it, could mean that a major fault is missed, then this could lead to major engine problems later on quite possibly.

Is your car displaying a fault code?

With some cars the fault code will appear on the cars central LCD screen, with some other cars it may simply be on the car’s dashboard, however, whichever car brand that you drive, you most definitely shouldn’t ignore any warning lights or error codes on your car.

If you’re looking for a local mechanic who can repair a problem with your cars ECU, or electrical sensors, then why not give us a ring today?