2013 Lexus ES 350 - mic isn’t working for phone calls

When using my phone in my car. When I make a call or receive a call, people cannot hear me or barely hear me. Not sure how to fix mic

It may be the mic or the Audio system. This isn’t anything that can easily be diagnosed over the internet. You need to take it someplace that specializes in this.

There’s no volume control on the mic as far as I know. The only volume control is for incoming audio. You might want to check the settings menu to confirm. Otherwise it’s most likely a bad or obstructed mic.