DPF Repairs Reading

DPF Repairs Reading


DPF Repairs Reading – regeneration and recoded software, we can solve your Diesel Particulate Filter problems here at the car service centre in reading berkshire with 25 years experience in the motor industry, cars are getting more advanced all the time, but we work very hard to keep up with the technology so we are able to work on all models of cars saving you from that dreaded visit to the main dealer with their high labour rate charges.

The Costly DPF System Counters Diesel Economy
The Diesel Particulate Filter (DPF) system is definitely the most problematic part fitted to almost all new diesel vehicles. The DPF filter sits in the exhaust and is designed to trap diesel particles (particulate soot matter) and stop it from escaping out the back of the exhaust and entering into our atmosphere. Although a great concept, the problems that come with the DPF system far outweigh the benefits and on some vehicles a replacement DPF filter from the dealers can cost you in excess of £2000!/3,000 depending on the make and model of the car.

That was not a typo error, our customer with a 2007 Mazda 6 2.0D was quoted £3,300.00 from his local dealer to have the filter replaced and reprogrammed wow.



Typical Problems Related to a Blocked DPF Filter

  • Loss Of Power / No Throttle Response
  • Warning Lights On Dashboard
  • Poor Fuel Consumption
  • Hard To Start & Slow Pick-Up In Speed
  • Limp Mode (Won’t even Rev Over 3000RPM)
  • Engine Starts & Then Cuts Out
  • Engine Fails To Start at all
  • Turbocharger Faults
  • EGR Valve Faults
  • Injectors Leaking.
  • Engine Seals Leaking
  • Complete Engine Failure worse case scenario especially if you keep driving and ignore the problem.

DPF repairs reading – If you are experiencing or having problems with your diesel particulate filter on your vehicle bring it to us because we can definitely safe you a lot of money on a regeneration of the DPF or Massive savings on replacement parts, because we buy in bulk we can obtain big discounts on parts which we can pass on to you our customer.

There are many fault codes associated with the DPF system. Some fault codes are vehicle/manufacturer specific and others are used across all the manufacturers. Officially Europe’s first DPF Repair specialists, we are by far the most knowledgeable DPF specialists in the country and have been working on correcting DPF problems on diesel vehicles every since 2006.

Diesel Particulate Filter Services

We provide a range of services from regeneration to replacement for customers suffering difficulties with their Diesel Particulate Filter (DPF) Systems.

Following the MOT changes introduced in 2014  we recommend you have your DPF  Serviced regularly


Diesel Particulate Filter (DPF); How they work and why they cause problems

The DPF looks similar to a traditional exhaust silencer but is mounted close to the engine. Inside is a complex honeycomb ceramic structure designed to filter the exhaust gases while minimizing flow reduction (which would otherwise limit performance). By forcing the exhaust gases through the walls between the channels of the DPF, the particulate matter is deposited on the walls, so reducing the amount of air pollution. Once the DPF reaches a certain level of ‘Saturation’ it performs a regeneration cycle to burn off the particulate matter inside the filter.

  • A car which is primarily used for motorway use will generally run at warmer temperatures and therefore produce far less particulate matter than one used in a stop/start city environment. A vehicle used on the motorway is also going to be able to regenerate more often and effectively as it is in the perfect driving environment for the regeneration process to occur,
  • Vehicles used for short trips and low speeds produce more particle matter and do not often reach the conditions required to initiate automatic regeneration of the DPF; requiring manual intervention to clear the DPF system of the soot build up,
  • Larger diesel vehicles with low duty cycles (short trip, low speeds) will suffer particularly with soot build up in the DPF.

Diesel Particulate Filter (DPF) Fault Diagnostics

When a fault is first indicated with the DPF filter it is important to first confirm the fault is with the DPF itself and not one of the sensors associated with the exhaust / DPF system. This is achieved by reading the fault codes from the vehicle, confirming these do not indicate a sensor failure and confirming the soot levels within the DPF are within the regeneration zone.

Diesel Particulate Filter (DPF) regeneration (cleaning)

The Diesel Particulate Filter (DPF) indicator signifies your vehicle’s DPF filter has not been regenerated (cleaned) and will require a manual / static regeration. Once this service is indicated it is advisable to have the procedure carried out as soon as possible to avoid long term and possibly expensive damage to the filter – (a replacement filter can cost up to £1800).

Why does the DPF need regeneration / cleaning ?

The DPF filter traps carbon particles, filtering exhaust gases as they pass through and, like any filter, this must be regenerated (cleaned) to restore it to full operation. Under normal circumstances the regeneration process is carried out by the car itself when the engine management/emissions management system detects the DPF is in need of regeneration. However Diesel vehicles used mainly for short journeys do not provice the system sufficient opportunity to regenerate the DPF resulting in a fault developing. This fault is indicated by the DPF / engine management fault indicator illuminating and/or a fault message on vehicles equipped with display centers.

What is DPF regeneration / cleaning ?

When a fault develops with the DPF filter, indicating manual regeneration is required, this is completed in combination of the workshop and driving the vehicle. Using our service computer we first tell the car to initiate the DPF regeneration process and then run the car at load. During the regeneration process sufficient heat must be generated for long enough for the regeneration to complete.

Note – Once a DPF fault is indicated, automatic regeneration will almost never be completed and continued operation will damage the DPF filter.

What if I don’t have the DPF Regenerated ?

Once the Engine Management Fault / DPF Fault Indicator has illuminated this indicates the DPF has not been regenerated through the normal driving range of the vehicle and requires manual/static regeneration.

Failure to have the regeneration completed at this stage could render the filter itself beyond repair and require complete replacement. A DPF that reaches 90% or approx. 45 grams full will be beyond regeneration and require complete replacement.

Depending on your vehicle make and model a failed Diesel Particulate Filter can cost upwards of £1000 to replace.

How long does the regeneration take?

The DPF regeneration cycle takes approximately an hour and a half (1 1/2 hours) to complete and can be completed as part of a routine service.

Why you cannot manually regenerate the Diesel Particulate Filter yourself

If you use your diesel vehicle for mainly short trips and the engine management light illuminates it maybe possible to have the car enter regeneration itself by simply using the vehicle over a long distance. However this is not recommended and is seldom successful because;

  • You cannot guarantee the vehicle will enter regeneration mode (we use our diagnostic equipment to tell the car to enter regeneration mode)
  • You must create significant engine load / heat to enable AND complete the regeneration cycle
  • The fault indicator will not switch off typically without the fault code being cleared (you may never know the DPF has been regenerated!)

DPF Additive Replacement

Some vehicles (Volvo, Citroen and Ford particularly) in addition to the standard DPF system incorporate an additive release system. This system releases controlled amounts of an additive into the fuel system to reduce emissions and promote cleaning of the system. This additive is held in a reservoir in the vehicle and when exhausted will need refilling.

DPF repairs Reading Refilling of the additive system is also indicated by the DPF fault indicator and an additional text advice where these systems are installed. This fault usually coincides with the requirement to regenerate the DPF. Failure to have the additive refilled will effect the vehicles performance and lifespan of the DPF system and should be addressed.

Diesel Particulate Filter (DPF) Replacement

When a DPF system becomes too full of soot it will be unable to regenerate successfully and require replacing. In normal use with normal automatic regeneration this will still occur. However if a DPF becomes unable to regenerate either automatically or manually it will require a full replacement.

Replacement of the DPF system requires the removal of the DPF assembly from the exhaust system and replacement with a new or approved unit. We do not recommend the installation of reclaimed DPF systems unless these have been certified as soot free before installation.

A typical DPF replacement can start at £900 and depending on vehicle maybe in the order of £1800.

Diesel Particulate Filter (DPF) Removal and your MOT

Vehicles fitted with a Diesel Particulate Filter (DPF) at manufacture that are identified during an MOT inspection to have had the DPF removed or disabled will now fail the vehicle MOT.

While the DPF itself and it’s correct operation is not part of the test (provided the vehicle emissions are within range) and a vehicle with a faulty DPF may still pass an MOT inspection, VOSA have advised all testing stations that identified removal or disabled DPF’s should be classed as a vehicle failure


DPF Repairs Reading