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OK, I've been doing the google thing and the forum search thing, and either I'm blind or I've lost my search mojo. I just got a used 2018 EX and It seems that it has started to beep 3 times when you start from a stop. I back up from a stop and it beeps 3 quick beeps. I move forward from a stop and the same 3 beeps. Every. Time. Pulling out of my driveway, to moving on when the light turns green. It's starting to drive me crazy and I'm seriously considering taking the car back. I've tried checking through the settings to no avail. It doesn't have "Lane Assist" so I don't think that's it. I've pulled the ECU fuse to try a ECU reset. That didn't do anything either to correct/stop it. Any guidance or helpful heckles would be appreciated.

 
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Parking brake?

 
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It's Off. I engaged it and disengaged it to make sure it was off.

 
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I *think* this has been corrected.
So I decided to fiddle with the HU some more and gave Settings>System>Beep volume a shot - turned it off. No more beeps from the button presses on the HU OR from start from stop. Partial Success! From that it felt like it was some setting in there somewhere so I did a Factory Data Reset. Afterwards I got the beeps from the button presses but none for the start from stop. Full Success? (more drive time will tell) I still have no idea what setting was changed for the start from stop beeps.
Also, Thanks Collin42 for that suggestion to check!

 
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Sounds like the computer maybe had a brain fart.
and no worries, haven't owned anything that new, that was the only thing I could think of