HiAce Van (1KD): DPF warning light / regeneration won't finish
Suspect a clogged DPF (the filter that traps exhaust soot) itself first. But in our cases the EGR cooler, EGR valve and intake manifold (intake side) come next, tied with the same number of cases. In other words, 'the DPF clogged' is the result; the source of the extra soot is often on the EGR or intake side. Replace only the DPF and it comes back.
What to suspect, in order
Repair cost estimates are shown only for parts with three or more cases that record a cost.
- How to tell (things you can check yourself)
- The DPF lamp flashes or stays on; manual regeneration stops partway or the lamp returns soon after. Typical with mostly short trips.
- If you leave it
- Driving without regeneration cuts power, and eventually the check engine light comes on and the vehicle may be immobilised.
- Typical model years and mileage
- 2007–2013 model years、47,500–216,250 km (median 118,750 km)。Stands out on high-mileage vehicles and those used for short delivery or commuting runs.
- How to tell (things you can check yourself)
- Coolant slowly dropping, occasional white smoke, frequent DPF regeneration. Confirmed at inspection.
- If you leave it
- Soot blockage upsets exhaust recirculation and loads the DPF.
- How to tell (things you can check yourself)
- DPF warning together with sluggish acceleration and black smoke. A soot-stuck EGR valve upsets the recirculation amount and increases soot. The scan tool shows EGR opening.
- If you leave it
- Soot keeps increasing until regeneration can't keep up and power is limited.
- How to tell (things you can check yourself)
- More vibration at idle, black smoke, and a sense of lost power before the DPF warning appeared.
- If you leave it
- A narrowed air path makes more soot and clogs the DPF faster.
- Typical model years and mileage
- Concentrated on high-mileage vehicles.
Which is the source is confirmed from the regeneration log and a differential-pressure check. Have a workshop plug in a scan tool first.
FAQ
- Can I drive with the DPF light on?
- While flashing, do a manual regeneration or get it checked soon. Once it's steady and power drops, don't push on — go to a workshop.
- Will cleaning the DPF fix it?
- Cleaning or replacement clears the warning, but unless the source of the soot (intake blockage, injectors, driving pattern) is fixed, it often recurs.
- Can it be prevented?
- A few times a month, drive for about 30 minutes continuously once warm, and change the oil with a DPF-compatible grade on schedule.
Cases (what it was, and how it was fixed)
Each collected case: model year, mileage, symptom combination, cause and parts replaced, cost and source. Facts only, no quoted text.
Any other symptoms? Tap the ones that apply to filter the cases and see which parts were common for that combination.
| Code / year | Mileage | Other symptoms | Cause / parts replaced | Cost | Source |
|---|---|---|---|---|---|
| KDH201 2013 model year | 44,200 km | — | 5th injector (DPF fuel-addition injector) | — | MLIT (JP) |
| KDH201 2007 model year | — | White smoke、No acceleration / lack of power | Injectors、DPF (diesel particulate filter) | — | Shop blog (JP) |
| KDH201 2017 model year | 189,157 km | Check engine light on | 5th injector (DPF fuel-addition injector)、Catalytic converter | ¥148,390 | Shop blog (JP) |
| KDH201 | 250,000 km | Check engine light on | EGR cooler、Intake manifold、EGR valve、DPF (diesel particulate filter) | — | Shop blog (JP) |
| KDH201 2007 model year | — | Rough idle / vibration | Swirl control valve、Catalytic converter、Intake manifold、Intake shutter valve、EGR valve、EGR cooler | — | Shop blog (JP) |
| — | 240,000 km | Rough idle / vibration | Intake manifold、EGR valve、EGR cooler | — | Shop blog (JP) |
| KDH201 | — | — | DPF (diesel particulate filter) | — | MLIT (JP) |
| KDH201 2014 model year | — | Check engine light on、No acceleration / lack of power | DPF (diesel particulate filter) | — | MLIT (JP) |
| KDH201 2011 model year | 100,000 km | Loud exhaust | Exhaust / muffler、DPF (diesel particulate filter) | — | MLIT (JP) |
| KDH206 2007 model year | 137,500 km | Check engine light on、No acceleration / lack of power | DPF (diesel particulate filter) | — | MLIT (JP) |
| KDH206 | 25,000 km | Check engine light on、No acceleration / lack of power | Catalytic converter、DPF (diesel particulate filter) | — | MLIT (JP) |
| KDH201 2008 model year | — | No acceleration / lack of power | DPF (diesel particulate filter) | — | MLIT (JP) |
Costs are as recorded in each case and vary by vehicle condition, region and shop. "—" means not recorded.
For DIY repairers: find the part
Searches by the No.1 part name. Always confirm fitment by model code.
Sources
- MLIT Vehicle Defect Information Hotline (Japan)（7 cases）
- Repair shop blogs (Japan)（5 cases）
Created by processing the Vehicle Defect Information Hotline data (Ministry of Land, Infrastructure, Transport and Tourism, Japan) (https://renrakuda.mlit.go.jp/renrakuda/opn.html)
No text is quoted from these sources. Only the facts of each case (model, symptom, cause, cost) are aggregated.
Reviewed by Tama Inc. (workshop certified by the Kanto District Transport Bureau) Reviewed on 2026-09-11 Updated 2026-09-13
This page shows what to suspect first, based on aggregated nationwide repair cases and our own experience. Always confirm the cause with an inspection. Repair costs are medians and ranges from the cases; they vary by vehicle condition, region and workshop.
Don't stop at cleaning the DPF. Unless you fix why it clogged (intake soot, EGR, injectors, short-trip use) it will be back within months.