# IACV problem on 2.169

**URL:** https://community.ecumaster.com/t/iacv-problem-on-2-169/2915
**Category:** EMU BLACK / CLASSIC
**Created:** [December 11, 2024, 8:44am UTC](https://community.ecumaster.com/t/iacv-problem-on-2-169/2915 "2024-12-11T08:44:07Z")
**Posts on this page:** 1
**Page:** 1

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### Author: ![bruce\_lee](https://avatars.discourse-cdn.com/v4/letter/b/c5a1d2/32.png) [@bruce\_lee](https://community.ecumaster.com/u/bruce_lee)
#### Post date: [December 11, 2024, 8:44am UTC](https://community.ecumaster.com/t/iacv-problem-on-2-169/2915/1 "2024-12-11T08:44:07Z")

</div>

The sound from the IACV became quite noisy, as soon as I updated the firmware to 2.169 on emub.  
Before, I couldn’t hear the sound at all; I had to adjust it to 450 Hz to make it quite. It was previously set to 300 Hz.  
I have 2 wire IACV from Honda.  
Has anyone else experienced something similar?  
btw, is have this problem on 2 cars.