This DELPHI Exhaust Pressure Sensor (DPS00070-12B1) is designed to accurately measure exhaust gas pressure. Proper measurement is crucial for the engine control unit (ECU) to optimize fuel injection, ignition timing, and emission control systems. A functioning sensor ensures your vehicle runs efficiently, reduces harmful emissions, and maintains optimal performance. Replace a faulty sensor to restore these critical functions and prevent potential engine damage or check engine light illumination.