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2017 Accord LX 6MT Modern Steel Metallic
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Many people have ground issues. Read my post HERE at DA and read that thread. You can do all you want to the alternators etc but if that one ground bolt at fender has bad connections you will have issues at some point IMO. My '19 Pilot the negative terminal is a PITA to get to. I went OVERBOARD in that but it gets used for compressor and other stuff.

I have THIS USB Charger in the cars to monitor the voltage. Watching it drop and stay at 12.6V drives my old school self crazy but that is how Honda designed it. Yours might have been a dying battery, that sensor or a poor ground to start but maybe not the alternator. Many places don't know the odd Honda charging scenario. The battery sensor was replaced on my '19 Pilot after getting weird messages.

My daughter killed her battery (lights on for days) in her CRV. She jumped it and I told her turn headlights on when she drives everywhere for now until I can give a good charge when she gets home from school. Her friends said to turn everything off so it would charge. She showed them on the USB charger and said "I'll listen to my dad, thanks". She has had no problem even with short trips since.
 

· Registered
2017 Accord LX 6MT Modern Steel Metallic
Joined
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428 Posts
Updated - I had the battery changed this morning , and also the sensor.
the old battery was starting to swell (https://www.oreillyauto.com/detail/...rd?q=super+start+battery+extreme+24rext&pos=5 )

With both batteries. The voltage was in the 12's , until I put the lights on and it rose to the 14s.
the old w/ old sensor
The new w/ new sensor

OLD BATTERY: https://www.oreillyauto.com/detail/...rd?q=super+start+battery+extreme+24rext&pos=5

NEW BATTERY: https://www.autozone.com/batteries-...ery-51r-dlg-group-size-51r-500-cca/330111_0_0
Many on here UPGRADE to the 24F battery. It has more power. The V6 uses that. There are threads on getting different battery box etc for the 24F upgrade, you went backwards. When mine dies someday the 24F upgrade is what I will be doing. The 51R is the correct battery for the 4cyl but less reserve capacity, less hutzpah, not what you want if you think you have issues.
 
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