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Bernie’s DPF Problems and Terraclean Blog


DPF Problem Diagnostics & DPF Cleaning

Fri 19th Jan 2018

2012 Peugeot Partner Van with a blocked DPF and in Limp Mode

A Company in Consett with a van off the road with DPF problems contacted me through a recommendation from a garage familiar with my work.

The Company had been given a quote of £1400.00 to rectify the problem with a replacement. they didn’t want to invest this much money in a repair on a 5 year old van.

First of all, I carried out a pressure test which confirmed the filter was blocked and also scanned the following faults:

  • P1490 Particle Filter. Detected Overloaded
  • P242f Particle Filter. Detected Clogged
  • P1435 Multiplexed additive pump. Can network fault or Pump fault
  • P1434 Multiplexed additive pump. Can network fault or Pump fault

The soot buildup was too excessive to allow a forced Regeneration.

I used the Terraclean DPF Cleaning System to remove the soot then tested the exhaust pressure to confirm the filter was clear.

Afterwards I did a road test to confirm the filter was clear and able to regenerate as normal.

To deal with the Additive fault I had to carry out tests on the system and found a configuration problem.

Cost of Repair and Diagnostics and reconfiguration £280.00 a saving of £1120.00 and peace of mind that the problem has been rectified properly.


TerraClean Peugeot 207 1.6 Petrol – Stockton-On -Tees

Sat 27th Jan 2018

Before the Terraclean Engine service the customer commented the car is running fine, but on occasion, it would sometimes produce a small amount of white smoke when the engine had warmed up.

First we checked the oil and coolant levels and also scanned the engine management for fault codes, but revealed nothing.

During the Terraclean service we monitored the engine with live data with our diagnostics equipment, and observed an occasional random misfire on cylinder 2 which seemed relevant and can be caused by several things, after the service the misfire didn’t occur again, we advised it would be a good idea to renew the spark plugs and change the air filter.


2008 Mondeo 2.0 TDCI DPF Problems and Terraclean

Sat 27th Jan 2018

A customer from Stockton-On Tees that had previously used our services booked with us again after we had correctly diagnosed and repaired a simple problem with a turbocharger on his Previous car.

The customers new car had just developed a fault and illuminated the engine management light, another garage had scanned the engine for faults and revealed a fault for the DPF P2002 – DPF Efficiency, this code doesn’t identify the actual problem it simply means the engine management saw data that it doesn’t expect to see so the cause can be one of many things, in this case it was a perished hose causing a lower than expected pressure reading.

I replaced the hose then the customer took advantage of a Terraclean service at the same time as this saved him the cost of my call out and diagnostics so made the repair very economical and he will now benefit from improved fuel economy.


2011 Nissan Qashqai DPF Light & Engine Managment Light

25 Feb 2018

A very big problem in the motor trade is misdiagnosis leading to wasted money and failed repairs.

Today we had an example where the customer wanted to book us to do a DPF clean, the problem is until we have done our diagnostics which involves more than merely reading fault codes.

Once I had read the fault codes which included an indication of a blocked DPF but further testing showed this wasn’t the case, there was also a fault for an exhaust temperature sensor so infact this was the fault that caused a failed regeneration causing the other faults, in this case a clean would have been a wasted expense which is why so many fail to cure the problem.


2009 Audi A3 DPF Problem with Flashing Glow Light and EML in Darlington

March 23rd, 2018

If you think the services of a professional is expensive wait until you see how much an amateur costs!

This is a story that is typical in my days work, the customer had taken his car to a garage to solve an issue with his DPF last year and was charged £400 for 5 hours Diagnostics by a garage that doesn’t understand how the system works, which ended up with the garage not finding the fault the customer was advised to put an additive in the tank to assist regeneration which is like taking a painkiller, it doesn’t fix the fault but only relieves the symptom temporarily.

It took me 10 mins to find and fix the problem (a faulty sensor) the DPF had only a partitial blockage so we took the car on a road test during which the Regeneration took place naturally demonstrating that the car is now fixed and able to operate normally, the owner had been driving in Limp home mode for so long he didn’t even realise it was in reduced performance mode.


Ford – Peugeot – Citroen – DPF Vaporizer Valve

We are very experienced in diagnosing and fixing the problems with cars and vans from:

Ford  Peugeot & Citroen

A common issue with these is failure of the Exhaust fuel Vaporizer causing Regeneration failure these are an expensive part and very difficult to access & remove.

We have extensive experience in diagnosing and repairing these we have invested in solutions that will save you on costly replacement, previously the solution was replacement of both the DPF and the Vaporizer which is very costly we can save you up 75% on the cost of replacement and put you back on the road much more quickly.

Common DPF Fault Codes:

P244B Diesel Particulate Filter Differential Pressure Too High

P246C Diesel Particulate Filter Restriction – Forced Limited Power

P24A4 Diesel Particulate Filter Restriction – Soot Accumulation Too High (Bank 1)

P2463 Diesel Particulate Filter – Soot Accumulation

P246B Vehicle Conditions Incorrect For Diesel Particulate Filter Regeneration

P244C Catalyst Temperature Too Low During Regeneration,Bank 1

these fault codes are a record of an a event they are not a full diagnosis, they do not state what caused the event or confirm the actual state of the DPF, which is why so many garages without the proper training and equipment misdiagnose dpf issues, and cost the customer dearly with repairs and replacements 90% of dpf cleans and replacement carried out were not actually required.

If your garage plugs a computer in to read the codes and tells you it needs a new DPF without further testing it is highly likely that they are wrong and you will be in for a large bill or a cleaning service that isn’t required also without resolving the problem and sometimes making it worse, a large percentage of our customers have been elsewhere first only to be met by failure.