Hondata

FlashProManager 4.4.6 (18 Apr 2025)

• Firmware updated to version 259
• Added support for CAN Bridge.
• [2022+ Civic Si] Added support for 2025 model 64B-AF3 (CAN Bridge must be used)
• [2022+ Civic] Added support for 2022 model 6KA-H03 China
• [2019+ RDX] Added support for 2022 model 5YF-AF2 USA
• [2016+ Civic] Added support for 2018 model 5AG-N91 South Africa
• [FL5] Added 66V-J04 binary support

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The most exciting news we've received since entering the in-depth modification stage，thank you for your work!
I will test Hondata tonight on my 6KA-H03

**Just switched from KTuner to Hondata — initial impressions and feedback (ECU: 6KA-H03)**

I couldn’t wait—right after getting off work, I immediately switched my setup from KTuner to Hondata. I used almost identical calibration data to what I had on KTuner, and after about 30 kilometers of test driving, I noticed some clear differences.

One key improvement: during cold starts, KTuner would cause an unusual RPM spike, whereas Hondata holds the idle steady right around the 1700 RPM I set—much more consistent behavior.

Under the same ignition and boost tables, the car now feels stronger, and I’m even seeing a slight improvement in fuel economy. I've also disabled rev hang, which really improved the feel of both upshifts and downshifts.

That said, throttle sensitivity feels a bit too aggressive right now. My current vehicle profile doesn’t support quick throttle setting adjustments. It would be amazing if we could get a few throttle sensitivity presets while keeping rev hang disabled.

One unexpected but awesome surprise—my model now has CANFlex support! If future updates could include 4-bar MAP sensor support, that would make things even better. My Garrett G25-550 turbo is ready to come alive!

Big thanks to the Hondata team for your great work!

So glad to know that CAN Bridge has added support. I want to know a bit more information. Can the CAN Bridge used for the Civic Si be used on the 2024 JDM FL5-110? Is the jailbreak process the same

Yes, CAN bridge can be used on the FL4-110. Jailbreak process is unchanged.

I disabled the Purge/EVAP system, however, during driving, the vehicle reported a P0420 DTC. I'm using a ... exhaust (DP), but I couldn't find a separate option to disable catalytic converter efficiency. I could only disable the secondary O2 sensor, but I'm not sure if that might affect closed-loop fuel correction.
ECU：6KA-H03