# EMU Pro 16 Buzzing when turned off

**URL:** <https://community.ecumaster.com/t/emu-pro-16-buzzing-when-turned-off/5799>\
**Category:** EMU PRO\
**Created:** [May 14, 2026, 6:17pm UTC](https://community.ecumaster.com/t/emu-pro-16-buzzing-when-turned-off/5799 "2026-05-14T18:17:10Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![Slash200](https://dub1.discourse-cdn.com/flex013/user_avatar/community.ecumaster.com/slash200/32/4792_2.png) [@Slash200](https://community.ecumaster.com/u/Slash200)\
**Post date:** [May 14, 2026, 6:17pm UTC](https://community.ecumaster.com/t/emu-pro-16-buzzing-when-turned-off/5799/1 "2026-05-14T18:17:10Z")

</div>

Hello,

my EMU Pro 16 is buzzing when the ECU is turned off.(Not when ignition is on)

I checked if the Ecu is Really Off: after turning the key its doing the configured start-up beep and the pump priming.

Here is a video of the sound.

[![](https://europe1.discourse-cdn.com/flex013/uploads/ecumaster/original/2X/4/407565959124bd58575a97b2a7c044cc56328da4.jpeg "Emu Pro 16 Buzzing") ](https://www.youtube.com/watch?v=d4CrExXa-0c)

Pulling Plug B stops the sound and plugging back plug b will not start the buzzing sound again. It will buzz after switching on ignition and then Off.

It only buzzes when the ignition is Off!

best regards

Bastian