Loud screech when start the cat

well, if you try to start a cat, that's what you're going to get.

but seriously, is this as soon as you press the start button?

how many miles?

an aftermarket products?

 

Pay attention to the dash warnings while you start your car. Sometimes they flash on and create a brief chirp and then go away quickly. Also, try and record the sound on your phone (video recording) when you are starting your car. Have the video pointing at the display area to maybe catch any warning messages that pop up. Finally, what's the state of your 12V battery, your fob battery?

 

If it's cold, mine does that too, but only in the cold. Wait until warmer weather and see if it still does it. It's the ICE kicking in.

 

Best take her to the vet.

 

if it had a fanbelt, i'd say the cat was living under the hood

 

Does it make the sound immediately with the car starting up? Or does it only make that sound only when the ICE comes on?

 

regardless, this is abnormal, is a warranty item and they need to investigate and repair it. Make them do their job!