Passive regeneration
Under suitable operating conditions, exhaust heat and the aftertreatment system allow soot to oxidize during normal driving.
Typical situation
Sustained operation with adequate exhaust temperature.
Diesel aftertreatment specialists
DPF trouble?
Start with the cause.
DPF diagnostics, cleaning, regeneration, and replacement in Richmond, VA. Get a clear next step for warning lights, repeated regens, and lost power.
DiagnosticsRegenerationFilter cleaningReplacement
Know your system
What does your
DPF actually do?
A diesel particulate filter captures soot from the exhaust. As soot collects, the system uses heat to burn it off through regeneration.
Ash is different: it does not burn away during a regen. Accumulated ash requires an appropriate cleaning process, and a damaged filter may need replacement.
Repeated warnings deserve a diagnosis. A filter problem may also involve sensors, exhaust leaks, engine operation, or other aftertreatment components.
Three ways soot is managed
Understanding
regeneration.
The right approach depends on soot loading, active faults, and the vehicle manufacturer’s service requirements.
Active regeneration
The vehicle’s controls increase exhaust temperature when conditions call for additional soot removal.
Typical situation
The system requests a regeneration cycle. Follow the vehicle’s operating instructions.
Parked & service regeneration
A parked regen may be operator initiated; a service regen uses diagnostic equipment when appropriate after evaluating the fault and filter condition.
Before proceeding
Excessive loading or active faults may require repair or filter removal instead.
Regeneration creates very hot exhaust. Follow manufacturer instructions and keep the exhaust away from combustible materials.
Recognize the signs
When the light
keeps coming back.
Tell us what your truck is doing and bring any fault codes. Symptoms help guide the inspection; they do not identify the failed part by themselves.
- DPF or check-engine warning lights
- Frequent or interrupted regeneration
- Reduced power or an engine derate
- Increasing exhaust restriction
- Changes in fuel use or operating behavior
Common issues we investigate
Soot or ash accumulation
Determine the loading condition and whether regeneration, off-vehicle cleaning, or replacement is appropriate.
Failed regeneration
Check the conditions and faults preventing the system from completing its cycle.
Sensor and related faults
Evaluate differential pressure readings, temperature signals, wiring, and other relevant components.
Underlying engine problems
Look for issues that can increase soot production or cause repeat aftertreatment complaints.
A clear service plan
Diagnose. Service.
Verify.
Repair the cause and assess system operation before deciding the next step.
Inspect & diagnose
Review symptoms and codes, check relevant data, and assess filter and component condition.
Choose the service
Discuss the recommended repair, regeneration, cleaning, or replacement based on the findings.
Check operation
Evaluate system behavior after service and discuss maintenance or follow-up needs.
DPF service questions
Before you
book.
Will a forced regen fix every DPF warning?
No. Regeneration addresses soot under suitable conditions. Ash, damaged filters, sensor faults, and other causes require a different repair.
Can I keep driving with a DPF light?
Follow the vehicle’s operator manual and the instructions associated with the warning. If there is a stop-engine warning, overheating, or unsafe operation, stop safely and seek assistance.
How long does DPF service take?
Timing depends on diagnosis, filter condition, parts availability, and the work required. Call with your vehicle details to discuss scheduling.
What information should I have ready?
Vehicle year, make, model, engine, fault codes, symptoms, and recent repairs. Mention whether the truck is at the shop or disabled roadside.
Richmond, Virginia
Let’s sort out
your DPF issue.
Diesel Tech Truck & Trailer Service
6030 New Osborne Tpke, Richmond, VA, USA