The answer to 'P-trap making gurgling noise' is that a gurgling sound coming from the P-trap under a sink is a common plumbing issue that usually indicates a blockage or air leak in the drain system. This can be caused by a variety of factors, such as a clogged drain, a broken or improperly installed P-trap, or issues with the venting system.
Some common symptoms of a P-trap gurgle include a slow-draining sink, unpleasant odors coming from the drain, and the gurgling sound itself. To troubleshoot and fix the issue, you can try clearing the P-trap, checking for any clogs or blockages in the drain, and ensuring the P-trap is properly installed. If the problem persists, it may be necessary to call a professional plumber to inspect the entire drainage system and make any necessary repairs.