Does the SAP make any noise?

[Hayden]

I can hear the secondary air pump cut on for maybe 10-20 seconds on cold starts, and it's noticeable, but not loud. I was wondering if it is normal for it to be audible at all, or if mine might be going bad. I haven't had the vehicle long enough to notice a change, but have since been more attuned to the things to look out for and noticed that whining sound as at least being fairly distinct among the symphony of sounds back there in the morning.