Mitsubishi 1.8 455 airflow sensor description:

This is a Mass Air Flow (MAF) sensor used in Mitsubishi 1.8L engines, sensor code 455. It is mounted on the intake air duct, just after the air filter box. The MAF sensor’s function is to measure the amount of air entering the engine, providing critical data to the ECU (Engine Control Unit) for precise fuel injection and ignition timing.

• Type: Hot-wire airflow meter
• Part code: 455 (stamped/engraved on the sensor body)
• Function: Detects intake air volume and density to optimize fuel-air ratio
• Location: Air filter box / intake pipe before throttle body
• Common use: Found in Mitsubishi Lancer, Galant, and some Proton models with 1.8L engines
• Symptoms of failure: Rough idle, poor acceleration, high fuel consumption, check engine light

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