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Mitsubishi Triton: EGR Valve & Intake Manifold Carbon Soot Blockage

EGR Valve & Intake Manifold Carbon Soot Blockage is a very common engine fault on the Mitsubishi Triton on the 2015–2023 cars, and we rate it major. Putting it right costs $600 to $2,000 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 34 documented faults on the Mitsubishi Triton.

Vehicle
Mitsubishi Triton
Engine
2.4L
Years
2015–2023
Fuel
diesel
System
Engine

This page covers the Mitsubishi Triton 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 Triton faults34 documented faults on this model

What you are looking at

No photograph available

We do not hold a verified photograph of the Intake manifold or EGR valve yet. We would rather show none than show a picture of a different part.

What goes wrong

The 4N15's EGR system recirculates exhaust gases back into the intake. Exhaust soot mixes with oil vapour from the crankcase ventilation system, depositing a thick tar-like carbon buildup inside the EGR valve, EGR cooler, and intake manifold. This restricts airflow, reducing combustion efficiency and triggering fault code P2413 (EGR System Performance). Deposits can accumulate significantly from as early as 15,000 km in vehicles used predominantly for short urban trips.

What you would notice

  • Gradual loss of power and throttle response, particularly noticeable when loaded or towing
  • Increased fuel consumption with no change in driving patterns
  • Check engine light with fault code P2413 (EGR system performance) stored
  • Rough idle or occasional surge at low throttle settings
  • Visible black carbon deposits visible inside the intake pipe when inspected

How to check it

Where to look. Intake manifold and EGR valve/cooler assembly on the driver's side of the engine

  1. Inspect for fault code P2413.

  2. Ask for any history of intake cleaning or EGR service.

  3. If a workshop inspection is possible: Check EGR valve operation with a scan tool.

  4. Remove the intake air duct immediately after the intercooler and inspect the inside of the intake manifold for black tar-like carbon deposits.

Parts involved: Intake manifold, EGR valve.

What it costs to put right

$600 to $2,000 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

  • “Has the intake manifold or EGR valve ever been cleaned or serviced?”
  • “Has the vehicle been used predominantly on short urban trips or highway driving?”
  • “Has fault code P2413 or any EGR-related code ever been logged?”

Now check the Mitsubishi Triton 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 Triton buyer questions

Is egr valve & intake manifold carbon soot blockage serious on a Mitsubishi Triton?

We rate it major and very common on the Mitsubishi Triton. The 4N15's EGR system recirculates exhaust gases back into the intake. Exhaust soot mixes with oil vapour from the crankcase ventilation system, depositing a thick tar-like carbon buildup inside the EGR valve, EGR cooler, and intake manifold. This restricts airflow, reducing combustion efficiency and triggering fault code P2413 (EGR System Performance). Deposits can accumulate significantly from as early as 15,000 km in vehicles used predominantly for short urban trips.

How much does it cost to fix on a Mitsubishi Triton?

$600 to $2,000 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 Triton years are affected?

Our research records this fault on the 2015–2023 Mitsubishi Triton. 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.

How do I check for it before I buy?

Inspect for fault code P2413. Ask for any history of intake cleaning or EGR service. If a workshop inspection is possible: Check EGR valve operation with a scan tool. Remove the intake air duct immediately after the intercooler and inspect the inside of the intake manifold for black tar-like carbon deposits. Look here: Intake manifold and EGR valve/cooler assembly on the driver's side of the engine