Active sensors require an external stimulus to operate. The combustion knock sensor is not an active sensor, unlike the other sensors listed.
Active sensors are sensors that require an external stimulus to operate and generate a signal. Among the sensors listed, the combustion knock sensor is not an active sensor as it detects engine knocking without needing a stimulus. The other sensors, such as the broad band heated oxygen sensor, exhaust gas oxygen sensor, and coolant temperature sensor, all actively respond to stimuli to provide feedback or measurements.
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