Mitsubishi check engine codes
Overview
Mitsubishi models sold in the US mainly use four cylinder engines. EVAP and catalyst codes are the most frequent at higher mileage.
Codes notably common on Mitsubishi
- P0420 Catalyst System Efficiency Below Threshold (Bank 1)
Mitsubishi specific notes
- Engine codes on this brand behave the same as on any other vehicle. Use the code pages below; the causes and urgency ratings apply.
Owner's manuals
Official Mitsubishi owner's manual / owner portal (manufacturer site; we do not host copies).
Repair manuals
Step-by-step service manuals for Mitsubishi with torque specs and wiring diagrams:
Haynes manuals for Mitsubishi Chilton manuals
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Recall lookup
Check open Mitsubishi recalls with your VIN at the NHTSA recall lookup.
Sources
Sources checked October 2026. Bulletins apply only to the models and years they list.
All other codes
These work the same on Mitsubishi as on any vehicle:
P0430 P0300 P0301 P0302 P0303 P0304 P0171 P0174 P0440 P0442 P0455 P0456 P0128 P0135 P0141 P0101 P0299 P2135 P0401