car won't start

Hey y'all, My 2013 Elantra will not start. When the key is turned, it will click once but not crank. The check engine, battery, and oil pressure light will be visible. The headlights can turn on. Here is what I have done so far: Checked battery. 12.5V resting and 11.65V under load (headlights...

Bottom line: my car doesn't recognize my key code. I started a zoom meeting on my phone on my way home tonight. When I got home, the meeting was still going, so I turned the ignition off and jumped out of the car with my phone in hand. The car started beeping and when I looked, the shift was in...

Just installed a new battery, and drove for a few days without problems. Today it won't start, just clicks when turning the key. Tried a battery jumpstarter I have (which is fully charged), and that's not starting it. Again, I just hear a single click when turning the key. Any ideas what might...