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I’d like to share the page : https://carfromjapan.com/article/car-maintenance/types-of-sensors-used-in-automobile-engine/
The writer divided Engine sensor as below table:
But it’s a bit different to identify the part.
I don’t understand what the Spark Knock Sensor and Voltage Sensor.
I heard/saw Knock sensor many times, but not Spark knock sensor. Both are the same?
And I’m always wondering if oil control valve, purge control valve, solenoid valve are in Engine sensor category.
And how about an idle speed actuator? Is it sensor or motor?