BRD is right on this, very nice video BTW.
Sensors are doing a selftest and PDC every second, that is one proprietary routine of AL for many years. Even if PDC of the sensor is OFF, sensor is operating as normal with selftest blink every second.
ALP sensors are using up a lot of electricity and is normal for them to warm up, some 10-15 degrees above ambient temperature. G8/9 sensors are much larger so heat dissipates more quickly so they only go 5-10 degrees above ambient temperature.






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