I’ve an Odyssey. the battery is coming on at low RPM below 1500 RPM, “check charging system” message is on the dash. battery light is on idle or stop. when rpm more than 2000, the battery light is off. I tried to shift the gear on park position, measure the battery is 11.3v, battery light is on,…

I would replace the alternator because its not charging the battery. How old is the battery? [image] More Information for DENSO 2100766

Have you considered a belt and/or tensioner problem? Turn the key to the RUN position (engine NOT running) and touch the alternator pulley with a screwdriver tip or even a length of coat hanger. If you can feel a magnetic attraction then the alternator may be fine although this back yard test is no…

What is the battery voltage when the car is not running?

8 yr old car. Battery age? Waiting for OP to say battery is 3 weeks old. But they never mention that. Till you ask them.

We have a 2012 Odyssey, and something very similar happened to us. Turns out it was the alternator. Cost was about $600 parts and labor. We opted for a Honda OEM, and I recall the generic alternator was maybe $100 less.

Check all grounds before throwing parts.

2 yrs old. battery voltage is 12.4v without running. when engine is running is 11.3v

i want to confirm it’s alternator problem because i throw in a new one has no return. what happen if it end up is other problem.

In the fuse box under the hood, see if the main fuse #1, 125 amp from the alternator to the battery has blown. [image] I the fuse is fine, then the electrical load detector may be faulty. Tester

Fuse 125A is ok. but i didn’t see the Alternator SP sensor 7.5A fuse.

2012 Honda Odyssey battery light on

Maintenance/Repairs

Cougar October 5, 2020, 3:08am 18

If it were me I wouldn’t bother trying to repair the old unit. I think you are better off and it is more cost effective getting a refurbished unit.

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2012 Honda Odyssey battery light on

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