MajorCommonEngine

Mitsubishi Delica D:5: 4N14 Diesel DPF Blockage from Short-Trip Operation

4N14 Diesel DPF Blockage from Short-Trip Operation is a common engine fault on the Mitsubishi Delica D:5 on the 2019 onward cars, and we rate it major. Putting it right costs $900 to $3,800 at New Zealand independent workshop rates. Below is what goes wrong, the symptoms to notice on a test drive, where to look, and what to ask the seller before you hand over any money. It is one of 19 documented faults on the Mitsubishi Delica D:5.

Vehicle: Mitsubishi Delica D:5
Engine: 2.3L
Years: 2019 onward
Fuel: diesel
Gearbox: auto
System: Engine

This page covers the Mitsubishi Delica D:5 as a model. Some faults only affect particular engines or build years — enter a plate below to narrow the list to one car.

All Mitsubishi Delica D:5 faults19 documented faults on this model

What you are looking at

No photograph available

We do not hold a verified photograph of the Diesel particulate filter yet. We would rather show none than show a picture of a different part.

What goes wrong

The 4N14 2.2-litre diesel engine's diesel particulate filter accumulates soot rapidly when the vehicle is operated predominantly on short urban trips that do not allow exhaust temperatures to reach the 550–600 °C threshold required for active regeneration. When passive and active regeneration cycles are repeatedly interrupted, the DPF reaches a critically high ash and soot load, causing back-pressure to spike, triggering limp-mode, and ultimately requiring forced regeneration or filter replacement.

What you would notice

Engine enters limp mode with DPF warning lamp illuminated and power severely reduced
Increased fuel consumption as ECU attempts extended active regeneration cycles
Exhaust smoke or pungent odour during attempted regeneration

How to check it

Where to look. Underfloor centre tunnel, downstream of turbocharger and oxidation catalyst

Watch for: Engine enters limp mode with DPF warning lamp illuminated and power severely reduced. If a workshop inspection is possible: Read live DPF soot-load and ash-load percentages via OBD-II scanner; inspect DPF differential pressure sensor for fault codes P2002/P244A; check service history for logged active-regeneration events and extended highway runs.

Parts involved: Diesel particulate filter.

What it costs to put right

$900 to $3,800 at New Zealand independent workshop rates. That is for this job on its own, not for the car.

An estimate, in NZD, for the repair as normally carried out. What a specific car costs depends on which part has failed and what it damaged on the way — treat this as the floor for a negotiation, not a quote.

Ask the seller

“Is this vehicle used mainly for short urban trips or regular highway driving?”
“Has the DPF warning light ever illuminated, and has a forced regeneration been performed?”
“What is the current DPF soot-load percentage on an OBD reader?”

Now check the Mitsubishi Delica D:5 you are actually looking at

Everything above is true of the model, and it is free. What it does not tell you is whether THIS car has been looked after: its odometer history and whether the reading has ever gone backwards, whether there is still money owing on it, whether it has been reported stolen, how many owners it has had and what it is really worth today. That comes from the official records for that plate. Enter the plate for the free details, or get the full history and a market valuation from $13.49.

Not sure what you would be paying for? See what a full KickTyres check includes.

Where this comes from

The failure described above is documented in published sources — owner forums, technical service bulletins, recall notices and workshop write-ups — held in our fault database. The inspection instructions and the cost estimate are KickTyres’ own interpretation of them, and it is a starting point for an inspection rather than a manufacturer statement.

Mitsubishi Delica D:5 buyer questions

Is 4n14 diesel dpf blockage from short-trip operation serious on a Mitsubishi Delica D:5?

We rate it major and common on the Mitsubishi Delica D:5. The 4N14 2.2-litre diesel engine's diesel particulate filter accumulates soot rapidly when the vehicle is operated predominantly on short urban trips that do not allow exhaust temperatures to reach the 550–600 °C threshold required for active regeneration. When passive and active regeneration cycles are repeatedly interrupted, the DPF reaches a critically high ash and soot load, causing back-pressure to spike, triggering limp-mode, and ultimately requiring forced regeneration or filter replacement.

How much does it cost to fix on a Mitsubishi Delica D:5?

$900 to $3,800 at New Zealand independent workshop rates. That figure is for this job on its own. A car showing the symptoms on this page is usually worth either walking away from or negotiating down by at least the repair figure.

Which Mitsubishi Delica D:5 years are affected?

Our research records this fault on the 2019 onward Mitsubishi Delica D:5. Build dates move around, especially on imported cars, so treat the range as the years to look hardest at rather than a guarantee either way. The official records tell you the exact build and first registration date for the car in front of you.