Diagnostics
Advanced Emissions Diagnostics & Aftertreatment
AssetStacc supports advanced emissions and aftertreatment diagnostics for applicable diesel-powered vehicles and equipment. Our workflow helps qualified technicians diagnose DPF, SCR, DEF, regeneration, sensor, aftertreatment, warning-light and emissions-related derate conditions.
Every diagnostic event stays on the asset
Each diagnostic event is connected to the asset's service history, technician findings, customer authorization, repair recommendations and future maintenance monitoring.
DPF — Diesel Particulate Filter
Restriction diagnostics with the data the technician actually reads on the asset.
- Soot load, differential pressure and exhaust temperatures
- Regeneration history, failed and frequent regeneration
- Cleaning or replacement recommendations with post-service verification
SCR — Selective Catalytic Reduction
Efficiency and catalyst faults traced to a root cause rather than a code reset.
- Upstream and downstream NOx sensor readings
- Catalyst efficiency faults and dosing performance
- Inducement and derate conditions, verified after repair
DEF — Diesel Exhaust Fluid
Quality, delivery and heating faults across the dosing system.
- Quality, level, temperature and pressure
- Pump, injector, tank heater and line heater operation
- Contamination, crystallization and dosing faults
Regeneration
Passive, active, parked and service regeneration documented as a controlled procedure.
- Technician safety confirmation before any forced regeneration
- Soot level, exhaust temperatures and duration before and after
- Completed or failed result with follow-up recommendation
Sensors, EGR & Aftertreatment Hardware
The supporting components that cause most emissions faults.
- DOC, EGR valve and cooler, NOx and exhaust temperature sensors
- Differential-pressure, ammonia and particulate-matter sensors when equipped
- Wiring, communication faults and manufacturer-specific emissions codes
Warning Lights & Derates
The conditions that stop a truck from working, captured with context.
- Check-engine, emissions and stop-engine warnings
- Engine, speed and torque derates
- Missing, incorrect or tampered emissions components documented as findings
Which assets this applies to
Light, medium and heavy-duty diesel trucks, tractors, buses, off-road and construction equipment, agricultural equipment, generators, compressors and light towers — where applicable emissions equipment is fitted.
Not every diesel asset carries the same emissions equipment. We identify the applicable system from VIN when available, equipment and engine serial numbers, year, make, model, engine manufacturer and model, engine family, fuel type, horsepower, on-road or off-road classification, the emissions label and the aftertreatment configuration before quoting or performing work.
How an emissions diagnostic runs
- 1
Account and asset
Select the customer or fleet account and the existing asset, or add a new one.
- 2
Confirm the configuration
Identify the engine and aftertreatment system from VIN or equipment and engine serial number, engine family, fuel type, horsepower and on-road or off-road classification. We never assume every diesel has a DPF, SCR or DEF system.
- 3
Complaint and symptoms
Record the customer complaint, warning lights, derate conditions and observed symptoms.
- 4
Qualified technician and equipment
Assign a technician with the required skills and the correct diagnostic equipment for that engine and protocol.
- 5
Initial scan
Record active, pending and historical trouble codes, live data and freeze-frame data where available.
- 6
Findings
Upload scan reports and photos, determine the likely failure or the additional testing required, and record the root cause.
- 7
Estimate and authorization
Recommendations become estimate service lines. The customer authorizes all or selected lines electronically.
- 8
Authorized work only
Repair, regeneration, cleaning or replacement is performed only for authorized lines, with codes cleared only when technically appropriate.
- 9
Post-service verification
Post-repair codes and live data confirm the result, follow-up is scheduled, and the entire record is saved to the asset history.
What we do not promise
System configuration and service availability vary by vehicle, equipment, engine, emissions system, technician qualification and diagnostic equipment. Advanced emissions diagnostics are separate from official Clean Truck Check compliance testing. A repair, forced regeneration, smoke test or official compliance test is only committed when the assigned technician, credentials and equipment satisfy the applicable requirements.
Common questions
Is this the same as a Clean Truck Check test?
No. Advanced emissions diagnostics are separate from official Clean Truck Check compliance testing. A diagnostic scan, repair, regeneration or code clearing is never represented as an official passing compliance test.
Does every diesel asset qualify?
No. System configuration and service availability vary by vehicle, equipment, engine, emissions system, technician qualification, diagnostic equipment and service area. We confirm the applicable configuration before committing to a service.
Can AssetStacc command a regeneration remotely?
No. Forced or service regeneration is a controlled technician procedure performed at the asset with a safety checklist and recorded authorization. The software documents and manages the workflow — it does not remotely control diagnostic equipment.
What is the current status of this capability?
Advanced Emissions Diagnostics & Aftertreatment is In Development as a dedicated structured record. Diesel diagnostic and repair work is performed today through our standard diagnostics, estimate and work-order workflow. See the Roadmap for current status.
Have a truck in derate or a recurring emissions fault?
Tell us the asset, the warning lights and what the truck is doing. We'll confirm whether the configuration and qualifications match before scheduling.