| Code | Malfunction |
| — | Electronic engine control unit (cars with manual transmission) or electronic engine and gearbox control unit (cars with automatic transmission) |
| P0100 | Air flow meter and its electrical circuit |
| P0105 | Atmospheric pressure sensor and its electrical circuit |
| P0110 | Engine air temperature sensor and its electrical circuit |
| P0115 | Coolant temperature sensor and its electrical circuit |
| P0120* | Throttle position sensor (channel 1) and its electrical circuit |
| P0125 | Feedback system (for fuel supply) |
| P0130 | Front oxygen concentration sensor (sensor 1) and its electrical circuit |
| P0135 | Front Oxygen Concentration Sensor (Sensor 1) Heater and its Electrical Circuit |
| P0136 | Rear oxygen concentration sensor (sensor 2) and its electrical circuit |
| P0141 | Rear Oxygen Concentration Sensor (Sensor 2) Heater and its Electrical Circuit |
| P0170 | The fuel system is malfunctioning |
| P0190* | Abnormal fuel pressure |
| P0201 | Injector Na 1 and its electrical circuit |
| P0202 | Injector No.2 and its electrical circuit |
| P0203 | Nozzle #3 and its electrics |
| P0204 | Nozzle #4 and its electrical |
| P0220* | Accelerator pedal position sensor (channel 1) and its electrical circuit |
| P0225* | Throttle position sensor (2nd channel) and its electrical circuit |
| P0300* | Ignition coil and its electrical circuit |
| P0301 | Detection of misfires in cylinder 1 |
| P0302 | Detection of misfire in cylinder 2 |
| P0303 | Detection of misfire in cylinder 3 |
| P0304 | Detection of misfires in the 4th cylinder |
| P0335 | Crankshaft angle sensor and its electrical circuit |
| P0340 | Camshaft position sensor and its electrical circuit |
| P0403 | EGR valve and its electrical circuit |
| P0420 | The functioning of the catalytic converter of exhaust gases is impaired |
| P0443 | Evaporative Evaporative Canister Purge Solenoid Valve and its Electrical Circuit |
| P1200 | Injector control pulse generator and its electrical circuit |
| P1220* | Electronic throttle control and electrical circuit |
| P1221* | Throttle Position Feedback System |
| P1223* | Throttle controller communication bus |
| P1224* | Throttle actuator (1st phase) |
| P1225* | Accelerator pedal position sensor (2nd channel) and its electrical circuit |
| P1228* | Throttle actuator (2nd phase) |
| R1515 | Brake system vacuum sensor and its electrical circuit |
Notes
- 1. If the check lamp lights up due to a malfunction of the engine control unit (vehicles with manual transmission) or the engine and automatic transmission control unit (vehicles with automatic transmission), communication between the MUT-II device and the engine control unit (vehicles with manual transmission) or the engine and automatic transmission control unit (vehicles with automatic transmission) is not possible and the diagnostic trouble code cannot be read.
- 2. As soon as the electronic engine control unit (vehicles with manual transmission) or the electronic engine and automatic transmission control unit (vehicles with automatic transmission) has detected a malfunction, the engine malfunction indicator lamp lights up each time the engine is restarted and the same malfunction is indicated again. However, for the position marked with the "*" icon in the table, the indicator lamp lights up only once, the first time the malfunction is detected.
- 3. The indicator lamp that is on can only go out when the following conditions are met:
- (1) When the engine control unit (vehicles with manual transmission) or the engine and automatic transmission control unit (vehicles with automatic transmission) has detected a transmission fault three* times. * In this case, "once" means the period from starting the engine until it stops.
- (2) In the misfire judgment mode, when the vehicle driving conditions (engine speed, coolant temperature, etc.) are similar to the condition under which the malfunction was first detected.
4. "Sensor 1" means that the sensor is installed closer to the engine, and "Sensor 2" means that the sensor is installed further from the engine than the first one.
(Article reprinted from the website: mitsubishiman)