AdBlue (SCR), the diesel particulate filter (DPF) and the EGR valve are a diesel car's most common trouble spots — especially in city driving. Voltimoto finds the fault through diagnostics in Tallinn and repairs the system so the car stays road-legal. We offer a software solution only for vehicles not used on public roads: competition, off-road and export vehicles and special-purpose machinery.
2026-05-03
What goes wrong with these systems?
AdBlue: A failed NOx sensor, pump or heater triggers a warning light and can end in a no-start lockout. Replacing the failed part usually fixes it.
DPF (particulate filter): Clogs frequently in city driving, causing power loss and limp mode. Diagnostics show whether the filter, a sensor or the EGR valve is to blame; a forced regeneration often helps.
EGR (exhaust gas recirculation): Builds up soot and deposits in the intake manifold, reducing engine efficiency and eventually jamming the valve. We replace a jammed valve.
Before deciding, we run car diagnostics to confirm the fault really is in the particulate filter, EGR valve or AdBlue system — so no parts are swapped and no software is changed when the real fault lies elsewhere.
DPF (particulate filter) solutions
The particulate filter clogs mainly in city driving, where the engine never reaches the temperature needed for regeneration — causing power loss, limp mode and recurring fault codes. We fix it with diagnostics, forced regeneration and sensor repairs. For the full detail, see DPF solutions in Tallinn.
EGR valve solutions
The EGR valve routes part of the exhaust gas back into the intake manifold. Over time soot and oil deposits build up there, reducing engine efficiency and eventually jamming the valve.
We replace a jammed or leaking EGR valve. For competition and off-road vehicles we also offer a software solution.
AdBlue (SCR) solutions
The AdBlue system injects urea into the exhaust to reduce nitrogen oxides. A failed sensor, pump or heating element often leaves the car in limp mode or refusing to start. We find the failed part through diagnostics and replace it. For the full detail, see AdBlue solutions in Tallinn.
Pricing
- AdBlue, DPF or EGR system diagnostics and repairRequest quote
- AdBlue, DPF and/or EGR software solution (competition and off-road vehicles)200–350€
- GPF/OPF (competition and off-road vehicles), swirl-flap and Start-Stop software solutionfrom 200€
Frequently asked questions
What are DPF, EGR and AdBlue solutions?
Diagnostics and repair of particulate filter, EGR valve and AdBlue system faults: we find the fault and replace the failed sensor, pump or valve, or run a forced regeneration. For competition, off-road and export vehicles we also offer a software solution.
How much does fixing a DPF, EGR or AdBlue fault cost?
Diagnostics cost 20–60 €. We quote repairs after diagnostics, because the price depends on the car and the fault. The AdBlue, DPF and EGR software solution for competition and off-road vehicles is listed at 200–350 € — see the full price list or ask for a free quote and we will reply the same business day.
How long does the work take?
Most jobs are done within one working day. We confirm the exact time after diagnostics — if a part has to be ordered, we book the car back in once it arrives.
Do you remove DPF, EGR or AdBlue systems?
Not on vehicles used on public roads — it is illegal and the car fails its roadworthiness test. For road cars we diagnose and repair the original system. A software solution is offered only for competition, off-road and export vehicles and special-purpose machinery.
If the car has to stay road-legal, the right route is diagnosing and repairing the original system — get in touch and we will help work out what is wrong.
What does a failing EGR valve do to the engine?
The EGR valve routes some exhaust gas back into the intake manifold, where soot and oil build up deposits over time. A jammed valve causes power loss, rough running and fault codes. Diagnostics show whether the valve needs replacing or the fault lies elsewhere.
Can the software change be reversed later?
Yes. We back up the original software before every job, so the factory setup can be restored. Software work carries a lifetime warranty.
