Hondata

V3.5.3 (12 Feb 2020)

• FlashPro firmware updated to version 175
• [2017+ FK8 Civic Type R] Added 93 octane flex fuel calibration
• [2017+ CRV] Added support for 2020 models 5PA-953, 5PA-963, 5PA-983
• [2018+ Turbo Accord 2.0] Added support for 2020 MT model 6B2-A21
• [2019+ RDX] Added support for 2020 models 5YF-A13, 5YF-A23, 5YF-A33
• [2016+ Turbo Civic] Added support for UK 2020 model 5AN-GJ1

Hi, I try to connect 2019 FK8 GT with my 3.4.4 manager, but failed.
After I update 3.5.3 in the software, it's work, but after flashing , the 'acc ' warning light showing on.

Most likely they are not related, enter diagnostic mode of the head unit and check for hard errors, and clear them, after a drive should clear itself. Possibly ro be able to clear them with just a drive. btw clean the sensor in front as well

btw have you checked if collision detection is not disabled, just press the button