DPF Diagnostics & Solutions

Origin of the DPF

DPF, known as the Diesel Particulate Filters, came into being about half a century ago when some governments started worrying about the consequences of harmful diesel emissions in the surrounding air. Since the past decade, the DPFs are being fixed along with the exhaust engines for every diesel vehicle to control soot emissions. However, such vehicles need to be serviced well for the proper functioning of the DPF, and there can be other issues associated with this innovation in the automotive sector.

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What is the Operating Mechanism of the DPF?

The DPF works in a way that it cleans up the exhaust gases by trapping all the accumulated particles on its walls, letting the gases to escape only. The soot or the filtered particles, which have been collected, are later burnt through the process of regeneration. The mechanism of DPF is entirely monitored by ECU, the Engine Management Computer. After reaching the level of saturation, the ECU is then able to operate the regeneration processes. There are three methods of regeneration, including the active, passive and forced regeneration.

Active Regeneration

Also referred to as the dynamic regeneration, is where almost half of the accumulated soot has to be burnt by transferring fuel to the exhaust. This way temperature has risen and hence regeneration occurs.

Passive Regeneration

Also referred to as spontaneous regeneration, occurs on its own when there is too much heat produced within the exhaust as a result of your vehicle moving at high speeds, leading to an increase in temperature.

Forced Regeneration

Also referred to as service regeneration, it is where there is a lot of soot accumulated in the filter and the active regeneration is unable to get the DPF cleared. It is usually done by a professional in workshops who use a tool, fuel and high temperature to clean the DPF. Buying a DPF might be expensive for you, so it is more convenient to get it cleaned this way.

How to Know If the DPF Gets Clogged?

People often remain confused while knowing if their vehicle’s DPF is having some blockage issues or not. There is a simple indication to make things clear. The vehicle will tell if you it has a problem by either going into limp mode giving you reduced power and putting the engine management light on. If this happens it’s extremely important to get it looked as soon as possible.

DPF DIAGNOSTICS & Solutions

Why Does A Diesel Particulate Filter Get Clogged?

There can be several reasons which result in the blockage of a diesel particular filter. The main causes are:

Travelling at minimum speeds and covering short distances: as a result, the engine fails to work at a high temperature causing blockage.
The inefficiency of the EGR valve: such valves may decrease the oxygen content in the cylinders which in turn leads to accumulation and formation of soot as well as particulates.
Improper Fuel Injectors: the fuel injectors play a main role in transferring fuel, an excess of fuel transferred to the DPF might cause a lot of soot to be accumulated.
Failure to identify the correct oil: The oil should have low amounts of Phosphorus and Sulphur. The vehicle’s diesel particulate filter may become clogged if these are high in quantity in the vehicle’s oil.

When issues arise you may have the engine management light with at least one of these codes

P0470 – Exhaust pressure sensor malfunction
P0471 – Exhaust pressure sensor range/performance
P2002 – DPF efficiency below threshold (Bank 1)
P2003 – DPF efficiency below threshold (Bank 2)
P2031 – Exhaust gas temperature sensor circuit (bank 1 sensor 2)
P2032 – Exhaust gas temperature sensor circuit low (bank 1 sensor 2)
P2033 – Exhaust gas temperature sensor circuit high (bank 1 sensor 2)
P2034 – Exhaust gas temperature sensor circuit (bank 2 sensor 2)
P2035 – Exhaust gas temperature sensor circuit low (bank 2 sensor 2)
P2036 – Exhaust gas temperature sensor circuit high (bank 2 sensor 2)
P242F – DPF restriction – Ash accumulation
P244A – DPF differential pressure too low (Bank 1)
P244B – DPF differential pressure too high (Bank 1)
P2452 – DPF pressure sensor A circuit
P2453 – DPF pressure sensor A circuit range/performance
P2454 – DPF pressure sensor A circuit low
P2455 – DPF pressure sensor A circuit high
P2458 – DPF regeneration duration
P2459 – DPF regeneration frequency

Does a DPF last forever?

DPF Diagnostics & Support:

A correctly functioning DPF is an important part of a modern diesel vehicle’s emissions-control system. When regeneration is unable to take place correctly, soot can accumulate within the filter, eventually causing warning lights, reduced performance and, in some cases, restricted or limp-home operation.

Rather than simply addressing the warning light, we aim to identify the underlying cause of the problem. Depending on the vehicle, this may include diagnostic testing, sensor checks, regeneration support, software diagnosis, cleaning advice or replacement-related calibration and setup.

Finding the cause early can often prevent repeat faults and unnecessary replacement of otherwise serviceable components.

Diesel Particulate Filter Solutions:

Like all emissions-control components, a Diesel Particulate Filter has a finite service life. Depending on how a vehicle is used, a DPF may require professional cleaning, regeneration, repair or eventual replacement.

Vehicles that regularly complete longer journeys generally allow the DPF to regenerate more effectively, while vehicles used mainly for short journeys can experience excessive soot build-up much sooner. Sensor faults, failed regeneration cycles and other engine-related issues can also contribute to DPF problems.

Empire Tuning can help diagnose DPF-related faults and identify the most appropriate solution for the vehicle and its intended use.

International, Competition & Non-Road Applications

Empire Tuning works with customers, dealers and vehicles throughout the world. Emissions regulations vary considerably between countries and also depend on how and where a vehicle is operated.

For vehicles used on public roads in the UK, Europe, or any other jurisdiction where the original emissions-control equipment is legally required, we do not provide calibrations intended to bypass those requirements.

Certain specialist emissions-related calibration services may be available for competition, development, agricultural, industrial, export or other non-road applications, or for vehicles operated in territories where such modifications are permitted under local legislation.

Customers requiring specialist work should contact us with the vehicle details, country of operation and intended use. Each enquiry can then be considered individually and we can advise what options are appropriate #STAYTUNED

Why Timely DPF Diagnosis Matters

DPF faults are often the result of another issue elsewhere on the vehicle. Faulty temperature or pressure sensors, EGR problems, injector faults, boost leaks and unsuitable driving conditions can all prevent the system from regenerating correctly.

Empire Tuning uses specialist diagnostic and ECU equipment to investigate these problems and determine the most suitable course of action.

Our aim is to provide a reliable solution appropriate to the vehicle rather than simply masking the symptoms.

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info@empiretuning.co.uk