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The ERA 550154 Detonation Sensor is engineered to identify abnormal combustion events within your engine, commonly referred to as knock or detonation. When detonation is detected, this sensor sends a signal to the engine control unit (ECU). The ECU then adjusts engine parameters, such as ignition timing, to prevent potential engine damage. This component is vital for maintaining optimal engine performance and longevity. Ensuring the correct functioning of the detonation sensor helps protect your engine from the harmful effects of uncontrolled combustion.