Hyundai/Kia Diesel Particulate Filter DPF Regeneration
Supported coding features by HiCOM diagnostic tool https://www.obdtester.com/hicom
What it does
- Forces an active regeneration of the Diesel Particulate Filter
- Raises exhaust temperature to burn accumulated soot
- Restores normal exhaust flow and reduces backpressure
When it is required
- High soot load detected by the ECU
- Frequent short-distance driving
- Passive regeneration not completed
- After resolving issues preventing regeneration:
- Exhaust temperature sensors
- Differential pressure sensor
- EGR system
- Glow plug system
Conditions that must be met
- Engine at operating temperature
- No active fault codes related to:
- DPF
- Exhaust temperature
- Differential pressure
- Fuel level above minimum (usually > ΒΌ tank)
- Stable battery voltage
- Vehicle in a well-ventilated area
What happens during regeneration
- ECU increases exhaust temperature using:
- Post-injection
- Boost control
- EGR reduction
- DPF temperature rises to regeneration range
- Soot mass is reduced
- Backpressure decreases
If regeneration is not performed
- DPF clogging worsens
- Engine may enter limp mode
- Increased fuel consumption
- Risk of damage to exhaust components
After regeneration
- Check soot load and differential pressure values
- Clear DPF warnings if required
- Perform a short road test
- If soot level remains high:
- DPF may require cleaning or replacement