After watching a video of how to access the cabin air filter in 2nd gen I noticed there is a connector attached to the panel covering the cabin filter access. It looks like there is some kind of sensor to which the connector is connected to. Can anyone tell me what exactly this sensor reads and what the purpose of it is? My first thought was perhaps it was for air flow? There is no "change cabin filter" indicator on these cars so I'm not sure what exactly Mazda put the sensor there for. My car does not have automatic climate control (nor do I see what any reading at the cabin filter would do even if it did).