It seems like your engine electrical lives off the battery when that
happens. You can do a quick and simple test with a multimeter. A
working charging system should read at least 13.5V (but no more than
14.5V) when the engine is running. If not then it may be a bad voltage
regulator, a faulty rectifying diode pack, or a bad ELD sensor.
i have no experience with ELD system. i only know that in newer
Hondas, the ECU turns off the charging system whenever it deems
neccessary to reduce load on the engine and therefore to conserve
fuel. In your case a bad ELD sensor may be the culprit. Do you see
the "Check Engine" light on?
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