HiAce Van (1KD): Check engine light on
Suspect the injectors first (they atomise the fuel), then the supply pump (high-pressure fuel pump). On a diesel HiAce, when the check engine light comes on, faults on the fuel delivery and injection side come top. Also on the list: a clogged DPF (diesel particulate filter), a dirty fuel filter and, rarely, worn piston rings.
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)
- Listen at idle for a clattering or rattling that is louder than usual, and feel for a fine shudder through the body. Long cranking, sluggish acceleration and thick black smoke often appear together. The light may come on and go off repeatedly.
- If you leave it
- You keep driving with poor combustion, power drops and you may not hold speed on hills. Extra soot loads the DPF and catalyst.
- Typical model years and mileage
- 2012–2014 model years。Most common on older, high-mileage vehicles.
- How to tell (things you can check yourself)
- Look for whitish, heavy smoke from the exhaust, a strong exhaust smell when stopped, and idle staying high for a while after driving. Some cars have a dedicated DPF lamp, so check what the symbol actually means.
- If you leave it
- As it clogs, exhaust can't escape, power drops and fuel economy gets worse. It also puts thermal stress on the engine.
- Typical model years and mileage
- 2007–2012 model years、32,200–205,000 km (median 50,000 km)
- How to tell (things you can check yourself)
- Cranking takes longer than it used to, and there are brief moments of power loss while driving, like a hiccup. Revs may feel slow to rise when you press the accelerator.
- If you leave it
- If fuel pressure can no longer be held, the engine can stop while driving. Metal debris circulating in the fuel system can mean other parts need replacing too.
- Typical model years and mileage
- 2011–2014 model years、55,800–116,600 km (median 103,000 km)。Tends to affect older vehicles.
- Typical model years and mileage
- 2014–2017 model years、63,900–175,226 km (median 119,500 km)
These are guides for narrowing down from the symptom. The cause is confirmed by an inspection.
FAQ
- Can I keep driving with the light on?
- Often you can, but drive cautiously. If the light is flashing, power is down, or noise or smoke has increased, stop driving and get in touch.
- How long does the repair take?
- It depends on the part. Filters are quick; injector, pump or DPF work may take days including parts ordering.
- Will it pass the Japanese inspection (shaken) with the light on?
- A lit warning lamp is flagged at inspection. Fix the cause and have the lamp off before the test.
- It went off by itself — is it fine now?
- The fault code is usually still stored and the light will return when conditions repeat. Getting it checked while it's off makes the cause easier to pin down.
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 2017 model year | 189,157 km | DPF warning light / regeneration won't finish | 5th injector (DPF fuel-addition injector)、Catalytic converter | ¥148,390 | Shop blog (JP) |
| KDH201 2016 model year | 126,500 km | Stalling / stops while driving、Heavy steering、Weak brakes / long pedal、Cranks but won't start | Piston rings、ECU | — | MLIT (JP) |
| KDH201 | 250,000 km | DPF warning light / regeneration won't finish | EGR cooler、Intake manifold、EGR valve、DPF (diesel particulate filter) | — | Shop blog (JP) |
| KDH201 2013 model year | — | — | Injectors、Supply pump (high-pressure fuel pump)、Fuel filter | — | MLIT (JP) |
| KDH206 | — | No acceleration / lack of power | Injectors、Supply pump (high-pressure fuel pump)、Common rail | ¥385,800 | Shop blog (JP) |
| KDH201 2016 model year | 119,500 km | Cannot drive / immobile、Black smoke | Catalytic converter | — | MLIT (JP) |
| — | — | — | Injectors | — | Shop blog (JP) |
| KDH201 2015 model year | 44,000 km | Rough idle / vibration、No acceleration / lack of power | Supply pump (high-pressure fuel pump) | — | MLIT (JP) |
| KDH206 2013 model year | 50,000 km | Rough idle / vibration、No acceleration / lack of power | Catalytic converter | — | MLIT (JP) |
| KDH201 2008 model year | 190,000 km | — | Turbocharger | — | MLIT (JP) |
| KDH201 2007 model year | 232,759 km | No acceleration / lack of power | Alternator、Wiring / connector | — | MLIT (JP) |
| KDH201 2014 model year | — | DPF warning light / regeneration won't finish、No acceleration / lack of power | DPF (diesel particulate filter) | — | MLIT (JP) |
| KDH201 2012 model year | 90,000 km | No acceleration / lack of power | Injectors | — | MLIT (JP) |
| KDH206 2012 model year | 65,900 km | No acceleration / lack of power | エンジン制御コンピューター | — | MLIT (JP) |
| KDH221 2014 model year | — | Black smoke | Injectors | — | MLIT (JP) |
| KDH201 2011 model year | 103,000 km | Stalling / stops while driving、Cranks but won't start | Supply pump (high-pressure fuel pump) | — | MLIT (JP) |
| KDH206 2012 model year | 120,000 km | No acceleration / lack of power | Injectors、Supply pump (high-pressure fuel pump) | — | MLIT (JP) |
| KDH206 2007 model year | 137,500 km | No acceleration / lack of power、DPF warning light / regeneration won't finish | DPF (diesel particulate filter) | — | MLIT (JP) |
| KDH206 2010 model year | 50,000 km | Oil consumption | Injectors | — | MLIT (JP) |
| KDH221 2008 model year | 43,000 km | No acceleration / lack of power | DPF (diesel particulate filter) | — | MLIT (JP) |
| KDH206 | 25,000 km | DPF warning light / regeneration won't finish、No acceleration / lack of power | Catalytic converter、DPF (diesel particulate filter) | — | MLIT (JP) |
| KDH206 2008 model year | 50,000 km | No acceleration / lack of power | DPF (diesel particulate filter) | — | MLIT (JP) |
| KDH206 | — | — | 5th injector (DPF fuel-addition injector) | — | Shop blog (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)（18 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 owner-chat (workshop certified by the Kanto District Transport Bureau) Reviewed on 2026-09-12 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.
For a 1KD check engine light, read the injector correction values on the scan tool first. If the DPF warning is on as well, the 5th injector (the DPF fuel-addition injector) is the likely culprit. Check that before condemning the four main injectors.