The engine malfunction indicator lamp (CHECK ENGINE) lights up if the following components of the fuel injection system are faulty:
- electronic engine control unit;
- oxygen sensor;
- air flow meter sensor;
- intake manifold air temperature sensor;
- throttle position sensor (channel 1);
- throttle position sensor (2nd channel);
- coolant temperature sensor;
- crankshaft position sensor;
- camshaft position sensor;
- atmospheric (barometric) pressure sensor;
- knock sensor;
- injectors;
- abnormal combustion disorder;
- immobilizer systems;
- fuel pressure failure;
- vacuum sensor in the brake booster system;
- power supply systems;
- accelerator pedal position sensor (1st channel);
- accelerator pedal position sensor (2nd channel);
- electronic throttle control systems;
- throttle feedback circuits;
- throttle servo (first phase of servo motor);
- throttle servo (second phase servo motor);
- throttle controller communication line systems.
(The material is based on data from the website: mitsubishiman)
Caution! If the electronic throttle control system malfunctions, the engine malfunction indicator lamp will start flashing.