Hitachi excavator air flow sensor 8-98065377-0 intake temperature sensor

8-98065377-0 is a dedicated air flow/intake temperature sensor for Hitachi excavators (and Isuzu engines), mainly used to detect the temperature, flow or pressure signals of the intake air, and feedback the data to the ECU, participating in fuel injection control, air-fuel ratio adjustment and emission management. Common Symptoms of Malfunctions: 1. Difficulty starting or unstable idling of the engine 2. Insufficient power, weak acceleration, increased fuel consumption 3. Black smoke or abnormal emissions 4. Air intake related fault codes appearing on the instrument panel 5. The engine enters torque limit or protection mode. This sensor responds sensitively and has stable signals, and is a key monitoring component of the engine intake system. It is recommended to replace it in a timely manner after damage to restore normal fuel control and power performance.