Typically tied to specific Honda model years, engine/transmission variants, or regional specifications. Common in:

Released around , version 3.5.5.2 was a significant update focused on stability and workflow refinements for the MCU Innovations platform.

| Category | Change Description | |----------|--------------------| | | Reduced enrichment duration by 15% for lower emissions at 20–50°F ambient | | Knock Control | Less aggressive retard below 3000 RPM (improves low-end response on 87 octane) | | Throttle Mapping | Smoothed tip-in transition in Econ and Normal modes (reduces “jerk” from 0-15% pedal) | | Monitor Readiness | Fixed EVAP monitor false incomplete after refueling (TSB 22-089) | | Boost Limit | Hard cut changed from 17.8 psi to 18.5 psi for ≤2 seconds in Sport mode |

#Honda #ECU #3552 #TuningLife