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Some of this may be normal if there are no stored codes. A stored fault code of P1298 would indicate a faulty Electronic Load Detector. This will not cause a check engine light.
Here is an explanation on what may be going on:
Since the early ’90s, Honda vehicles have come withan electrical load detector (ELD) unit in theunder-hood fuse/relay box. This unit allows theECM/PCM to regulate the alternator (switch itbetween high output and low output) to provide thebest combination of fuel economy and electricalsystem operation. The ELD sends a signal to theECM/PCM that’s proportional to the electricaldemand. The ECM/PCM switches the alternatorbetween high output and low output depending onseveral factors, which include electrical demand,battery charge level, and the driving cycle. When thealternator is in low output, the engine load is reducedand fuel economy improves.
You will not see an error message for P1298 which is the ELD. This part is inside the fuse box under the hood and is replaceable separate of the complete fuse box. You would need to have the computer system scanned for codes to see if this code is set.