Why does my car make a sloshing sound when I turn it on?
Why does my car make a sloshing sound when I turn it on? The most common cause is a clogged drain trapping water in the heating and cooling system. The water, formed by condensation, usually empties onto the ground. But a clogged drain can cause it to back up, leading to the sloshing sound and even dampness on the passenger-side floor. Build & Buy Car Buying Service What does the sloshing sound under the dash mean? My experience (in multiple cars, albeit not your make/model) has been that this sound always means your cooling system is under-filled. Is it normal...