DPF · AdBlue · EGR · NOx
The warning is real.
The cause still needs testing.
Fault-finding, component testing, DPF cleaning or regeneration, wiring repair, replacement, coding and supported software work—for motorists and the motor trade.
Start with what the driver sees
Countdown.
Limp mode. Blocked again.
01AdBlue countdown or starting prevented warning
02DPF regeneration keeps failing or the light returns
03EGR or airflow fault remains after previous work
04NOx, pressure, temperature or dosing-sensor faults
05Peugeot or Citroën additive/PAT-fluid faults
The repair route
Measure what
the system is doing.
DPF, EGR, AdBlue/SCR, sensors, wiring and engine operating conditions can affect one another. The useful answer comes from comparing the whole fault story.
- 01 · INTERROGATE
Read the complete fault record.
Codes, warning history, live data and previous repairs establish what needs testing.
- 02 · MEASURE
Check whether the data is believable.
Pressure, temperature, dosing, actuator response and electrical circuits are assessed where relevant.
- 03 · REPAIR
Use the service the evidence supports.
That may be wiring work, a component, coding, software, regeneration, cleaning or another diagnostic route.
- 04 · VERIFY
Confirm the system after the work.
Applicable resets, adaptations, operating checks and rescans are completed without inventing certainty.
What Engine Clean provides
Diagnosis first.
Repair where proven.
Suitable initial inspections may be mobile. Cleaning, component work, coding, software or extended testing may require workshop time. Collection and delivery can be discussed where appropriate.
System scans, live data, actuation, electrical checks and physical testing matched to the vehicle.
Used when filter condition and the underlying cause make the process technically appropriate.
Power, ground, circuit, connector and sensor faults repaired when they are proved.
Correct components fitted or supported data procedures completed as required.
Considered only where supported and relevant to the diagnosed vehicle and repair route.
Clear boundaries
No delete.
No magic reset.
No guessing.
Engine Clean does not advertise DPF or AdBlue deletes, guaranteed cleaning cures, fixed prices without vehicle details or guaranteed mobile completion.
We will tell you what the evidence supports, what remains unproved and when the sensible next stage needs workshop access.
Emissions knowledge centre
Start with the warning
that brought you here.
Real workshop evidence
Two warnings.
Neither needed a guess.
Before you book
Straight answers.
No miracle claims.
Do you only clean DPFs?
No. We diagnose why the filter loaded or regeneration failed, then recommend regeneration, cleaning, repair or replacement only when the evidence supports it.
Can an AdBlue warning be fixed by topping up?
A genuine low-level warning may respond to the correct refill procedure. A system fault or countdown can remain until its cause is diagnosed and repaired.
Can you quote from a warning-light photograph?
The photograph helps us begin, but the make, model, year, registration and actual test findings are needed before an accurate repair route and price can be given.
Photograph the warning before it disappears.