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HondaECU 3.5.5.2 is a software update for the HondaECU flashing tool
This specific release focused on improving the reliability of the software's interaction with vehicle hardware: honda ecu 3.5.5.2
If you are tuning for power, stay on 3.5.5.2 or flash to it. If you are fixing a check engine light (P1457, P0420), go to 3.6.0.0. HondaECU 3