Upstream and downstream values are reviewed where the vehicle makes them available.
NOx sensor or emissions warning?
NOx & Exhaust Sensor Diagnostics Test the System Before Buying Sensors
We use fault data and live readings to investigate NOx, pressure and exhaust-temperature sensor problems. Call now and tell us the warning message or main symptom.
Quote before work startsCars and vansHome or workplace
Diagnostics firstWe check whether cleaning is the right fix.
Diagnostics first
A sensor code needs supporting evidence.
NOx and exhaust sensor faults can trigger engine warnings, AdBlue countdowns, limp mode and failed regeneration. We compare upstream and downstream readings, operating conditions and related codes before advising on replacement.
Temperature readings are checked for plausibility and correct response.
Differential pressure data and pipe-related faults are assessed before condemning the DPF.
Sensor faults are considered alongside voltage, communication and associated SCR or DPF codes.
More mobile diesel services
DPF, AdBlue, EGR and sensor diagnostics.
Warning lights often involve more than one emissions component. We test the relevant system before recommending cleaning or replacement.
A complete scan identifies stored, pending and manufacturer-specific emissions faults.
We read the engine-management faults and freeze-frame information linked to the warning.
Upstream and downstream values are reviewed where the vehicle makes them available.
Relevant control units are scanned for current, pending and historic faults.
One complete mobile service
Check. Clean. Confirm.
No long garage wait and no quick code clear. We agree the work before it starts and explain the result before we leave.
Check the cause
Fault codes, live data and DPF pressure are checked before any cleaning starts.
Clean on the vehicle
Professional mobile cleaning with the filter left fitted to the car or van.
Regenerate and road-test
We monitor the system through regeneration and a test drive where suitable.
Aftercare
Clear aftercare. No confusion.
We explain the DPF result before we leave.
30-day cleaning warranty
The warranty covers our DPF cleaning work only. It does not cover sensors, engine faults or faults that develop later.
Final DPF reading
We show you the final DPF pressure reading after the service and explain what it means.
Before you replace the DPF
Let us check whether it can be restored.
Send your postcode, vehicle details and warning message. We confirm availability and the diagnostic quote before the appointment.
Call now- Mobile call-out
- Diagnostic checks
- On-car clean when suitable
- Clear findings and next steps
Kent · West Sussex · Surrey
We come to you.
Home or workplace by appointment. Send your postcode and we will confirm coverage and availability.
Quick enquiry
Get a quote.
Send your contact details and postcode. We will reply with availability and a clear quote.
Prefer to call? 07393 912231Quick answers
Before you call.
Does every warning light need a DPF clean?
No. We diagnose first. If the fault points elsewhere, we explain it before unnecessary cleaning.
Do you remove the filter?
No. The professional clean is carried out with the DPF fitted to the vehicle.
How quickly can you attend?
Same-day or next-day appointments may be available depending on your postcode and the schedule.
What details should I send?
Your name, phone number and postcode. Add a short message only if you want to.