2012 Mitsubishi Triton (MN) — Repair Solution

2.5L 4D56T 4cyl 16v DOHC Turbo CRD Diesel Auto · Erratic Idling / Idling problem · Engine

Mitsubishi Triton (MN) Erratic Idling / Idling problem Engine Diagnostic Sequence Available

Vehicle Details

Make: Mitsubishi
Model: Triton (MN)
Year: 2012
Engine: 2.5L 4D56T 4cyl 16v DOHC Turbo CRD Diesel Auto
Kilometres: 124,534
Area: Engine
Category: Erratic Idling / Idling problem

Customer Complaint

The idle hunted and was not smooth, with the tacho moving up and down by about 50–70 rpm.

Problem Summary

The hunting began about a week after the customer bought the vehicle. There was no engine warning light and no fault codes. Cleaning the MAF, replacing the air and fuel filters, and fitting a genuine EGR motor had not resolved it.

Diagnostic Sequence

The step-by-step diagnostic process used to identify this fault is available to TaT members.

Unlock with Free Trial

Fault Description

The detailed fault description and root cause analysis for this 2012 Mitsubishi Triton (MN) is available to TaT members.

Unlock with Free Trial

Verified Repair Solution

The confirmed repair procedure for this 2012 Mitsubishi Triton (MN) is available to TaT members. Includes the verified fix and technician tips.

Unlock with Free Trial

Quick Facts

CodeMITMN12117
Vehicle2012 Mitsubishi Triton (MN)
Engine2.5L 4D56T 4cyl 16v DOHC Turbo CRD Diesel Auto
ComplaintVisible
Diag. SequenceMembers Only
SolutionMembers Only

Need the Full Fix?

Get the complete diagnostic sequence, verified solution, and technician tips.

Access the Full Repair Solutions Database

Unlock 6,221 verified repair solutions with complete diagnostic details, confirmed fixes, and technician tips.


© 2026 The Automotive Technician (TaT) — www.tat.net.au