Indicates an overly rich air-fuel mixture. The workshop manual advises checking for a leaking fuel injector, a restricted air intake filter, or a cracked intercooler hose losing boost pressure.
Do not just search for "4M42 manual." Look up your specific truck chassis code (e.g., FE71B) to ensure the wiring diagrams match your cabin configuration. mitsubishi canter 4m42 service manual
Electronic Common Rail (later generations) or Electronic Distributor Pump (early generations) Bore x Stroke: 95.0 mm × 105.0 mm 2. Core Sections of the Service Manual Indicates an overly rich air-fuel mixture
For modern electronic 4M42 engines, the Engine Control Module (ECM) monitors system health through various sensors. If the check engine light illuminates, a diagnostic scanner will pull specific fault codes. Below are common 4M42 trouble codes: Fault Description Common Root Cause Rail Pressure Sensor Circuit Malfunction Faulty sensor wiring or failed sensor. P0201 - P0204 Injector Circuit Malfunction (Cylinders 1-4) Open circuit in injector harness or burnt solenoid. P0404 EGR Valve Exhaust Gas Recirculation Circuit Carbon buildup blocking the EGR valve piston. P1220 Fuel Injection Timing Control System Malfunction Internal timing advance mechanism failure within the pump. P2264 Water in Fuel Sensor Circuit Fuel filter separator bowl needs to be drained immediately. 6. Routine Maintenance Schedule Below are common 4M42 trouble codes: Fault Description
Carbon deposits are restricting the movement of the EGR valve. 5. Tips for Locating a Valid 4M42 Service Manual
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