01
Why DPFs block
If regeneration doesn’t function properly it leads to a build-up of soot affecting performance and fuel economy, left unattended this will result in a Blocked DPF which can ultimately cause very expensive damage to other engine components. A blocked DPF is also potentially dangerous as it can cause overheating in the exhaust system and cause a fire risk. To prevent this damage most new vehicles will go into “Limp Home” safety mode at this stage, meaning the vehicle will have minimum power barely sufficient to crawl home.
For regeneration to take place it requires the vehicle to be driven regularly at some speed on open roads e.g. motorway driving, typically driving at around 2500 RPM for approx. 15-30mins at least once a month, this will keep things working. If your vehicle has gone into limp mode or you're seeing DPF warnings while driving around Chatham, Sittingbourne, or Maidstone, our mobile team can help. We offer professional diagnostics and software fixes right at your door across Kent and Essex. For more on how repeated short journeys affect regeneration, read our short-trips DPF guide.
02
DPF maintenance and short journeys
Many diesel vehicles are used primarily for short journeys, rarely getting up to the full operating temperature that a regen needs; and over time a DPF will suffer from an accumulation of ash residue whether it has been correctly regenerating or not. Even if the regeneration functions as it should, over time the ash residue will build up in the DPF and have the same affect ultimately resulting in a blocked DPF. For this reason a DPF is classified as a Serviceable Item by the vehicle manufacturers like brake pads or air filters etc and not covered under warranty. DPF systems therefore need to be maintained properly. For a closer look at why short Medway trips block a DPF, see our practical guide.
This work is only for vehicles that are not used on public roads. If you are unsure whether your vehicle qualifies, please ask us before booking.
DPF, EGR and AdBlue software changes are supplied only for genuine motorsport, track, competition or off-road vehicles that are not used on public roads. Before any such work begins, we ask you to complete and sign our Customer Declaration, which names the vehicle and its intended off-road or motorsport use. We do not offer this work as a repair or fault fix for a road vehicle.
A DPF that was fitted as original equipment but is physically missing or obviously modified is a major defect and will fail an MOT. An illuminated engine or emissions warning light, or emissions above the permitted limits, can also cause a failure. But a software change on its own is not automatically an MOT failure in every case — the result depends on the vehicle and the applicable test requirements.
03
A blocked filter is a repair job, not a software one.
Where a DPF is genuinely blocked with soot or loaded with ash, cleaning or replacement is the honest answer, and no software change is a substitute for it. We will tell you which of those we are looking at rather than selling you the wrong one.
04
Get a Professional Solution Today
Don't risk your vehicle with uncertified mobile tuners. At Kent Eco Tuning, we combine IMI-certified expertise with a fully insured mobile service that comes to your home or workplace across Medway and Kent. We don't just fix the symptom; we solve the problem.
05
Related reliability software
Swirl flaps sit in the same family of reliability work as DPF and EGR — intake-side components that can cause running issues on some engines. See our swirl flap solutions for how that software work is approached.
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DPF Solutions
07
Will a remap remove my DPF?
No. We do not carry out emissions deletions on road vehicles. Calibration work keeps the filter and its regeneration strategy working as designed.
08
Why does my DPF keep blocking on short trips?
Short, slow trips stop the filter reaching the temperature it needs to regenerate. Longer, faster runs let it clean itself; repeated blocking can also point to a sensor or fueling fault.
09
Will DPF work affect my MOT?
A healthy, correctly calibrated DPF passes MOT emissions testing. Defeating or removing emissions equipment causes failure - which is why we never do it.