Mitsubishi Trouble Codes and Known Issues

Mitsubishi is popular in many markets for the L200 (Triton) pickup and the Montero (Pajero), with 4D56 and 4N15 diesel engines built for hard use. On the gasoline side, the Lancer and Outlander share engines and, in recent models, a CVT transmission.

Most searched models: L200 / Triton, Montero / Pajero, Montero Sport, Lancer, Outlander, Outlander Sport / ASX and Mirage.

Common problems on Mitsubishi vehicles

• Injectors and rail pressure on common rail diesels, which are sensitive to contaminated fuel.
• EGR valve and intake manifold clogged with carbon on diesels.
• CVT on the Lancer and Outlander: fluid overheating.

Tips for diagnosing a Mitsubishi

• On the L200 and Montero, drain the water from the diesel fuel filter often, especially if you refuel in rural areas.
• After replacing injectors on the diesels, they must be coded with a scan tool.

Do you have several codes at once? Use the free multi-code diagnosis for Mitsubishi: it sorts the codes by priority and shows these make-specific notes. Below are the codes with documented quirks on Mitsubishi vehicles.

Make notes are a guide based on well-known common failures. Always confirm with the manufacturer's documentation for your engine and model year.