Got this message from the chevy app. Anyone else ever get it? If so did you have it checked? My dealer is two hours away.

 

Go to a local parts store and have your battery load tested.

 

Do you have the check engine light. Do you know if a DTC is set?

I am not familiar with that message. You would think it it was a "low" battery it would say so. Some members have received a low battery message. A general battery issue, is....well.....pretty general.

I hate to suggest that you look at the battery voltage - I personally think trying to interpret battery voltage and charging system voltage is going down a rabbit hole.

Normal voltage range on the DIC voltmeter when the engine is running is 12.5-15.5 volts depending on the computer selected system charging mode. You could verify that the voltage is within that range when the engine is running. But within that range, it can be all over the place.

You could also read that voltage on the DIC with the engine off and ignition in service mode - but be aware that in that condition, the car's systems are fully awake and the draw on the battery is on the order of 10 amps or even more. So that is not open circuit. Under that condtion though, my brand new battery, and also the old that was 5 years old, measured 12.1-12.3 volts. You could check that to see if the voltage is catastrophically low, like under 12.

And you could have the battery load tested.

A "general battery issue" just sounds strange - I wonder it that could include an issue with the charging system?

 

Also while you're at the parts store, buy a cheapo code reader to see what messages, if any, it shows you. Btw, I've seen others report getting what were apparently vague bogus messages from the app. All the best.

 

Where do you live that the nearest chevy dealer is two hours away???
You know you can take your car to any chevy dealer for service, right?

 

You've got a 2026 with only 303 miles on it your being told you have a battery problem but, it doesn't know what the problem is. Something does not sound right there??

 

My Roswell HTC did the same thing right before it went dead for no apparent reason. Put a charger on it.

 

By "same thing" do you mean you got the message the OP posted about a "general battery issue"?

 

Thanks all!
I will take it out for a few short rides today and see what happens. I put it on the tender overnight.
I have my jump box in it and will take my volt meter.
Local dealers are thieves and service is done by hacks. I've been keeping an eye on them for years.
I bought it at MacMaulkin and will go back there.

 

Yes to what he said. Same message?

 

Has the car been sitting unused for a while and not on a tender ?

 

Yes. I'm trying to guess what the car system could base that message on. I know what it measures, but not necessarily exactly how it processes that information leading to that "general battery issue" message.

What does the C8 measure ?

The C8 has a battery monitor module that sits between the negative battery post and the negative battery cable - and it measures battery voltage and current in and out of the battery. It does this both when the engine is running and when the engine is off.

How does the C8 use those measurements?

Per the Service Manual description, the C8 uses those measurements to assess the state of charge of the battery when the ignition is off (Battery Sensor Module Learn procedure) and when the engine is running it keeps a running tab on the battery state of charge and as a key factor in the selection of the charging system modes. It will also detect a low battery condition, display a low battery condition on the DIC, and also with will manage load shedding, shutting down various systems if necessary to keep the battery from fully discharging (so it says in the manual). But until now I have never seen that "general battery issue" message.

What else might the C8 charging system do with that information? (this is the speculation part)

Whether or not it does anything more sophisticated with those measurements is not disclosed in the Service Manual. But it could. An example of how that could work is based on CTEK's recently introduced, flagship model battery maintainer/charger, the CS ONE (Gen2), that uses what they call Adaptive Charging Technology (APTO). It works with any battery type and does not require the operator to indicate what the battery type is. Skeptical? Here are the links:

https://www.ctek.com/storage/F815DF1...-low-US-EN.pdf

https://www.ctek.com/ctek-magazine/e...E2%84%A2-touch

And here is the gist of what it says it does - extracted from their advertising:"Look at vehicle batteries that need a charge and they all look the same from the outside. You can stick a standard battery charger on and let it progress through its charging modes and hopefully a few hours, or perhaps overnight, you end up with a battery in good enough health. But on the inside, each depleted battery has its own story to tell. It has its own specific needs and its own way of responding to the intervention of a battery charger being clamped on, powered up and running through its cycles. There is a better way. It’s smarter, safer and more efficient. It’s CTEK’s exclusive APTO™ adaptive technology. APTO™ doesn’t proceed step-by-step through a pre-programmed series of modes, even if your battery does not need all of those steps. APTO™ listens to your battery, it constantly analyses this feedback and creates and executes a bespoke charging algorithm that’s made to measure for your battery, its needs and its responses to the charging process.Thanks to it being a good listener, a battery charger with APTO™ can be safely and easily used with a wide range of lead acid or lithium battery types without you having to choose which modes should apply and when. The APTO™ charger checks not only the battery health but also its size, its reactions to the charging process and even the ambient temperature to personalize and adapt what it is delivering to the battery. "

I'm interpreting this statement (battery reactions to the charging process) as meaning it looks at the current flow vs charging voltage and also probably the rate of change in that response as the battery charges to evaluate what type it is and what condition it is in. In other words, as the battery charges up, the charging voltage required to maintain the same current flow will increase. How that progresses could be a clue to what's going on inside of the battery. Notice it no longer needs to go though a pre-set charging profile. Now does the C8 charging system do that? I do not know - anything there would be pure speculation.

 

Yes. In post 1, you posted a message your received in his MyChevy app that said "general battery issue", and your question in post 1 was "Anyone else ever get it? If so did you have it checked?"

RapidOne said the same thing happened to him - I quoted him and asked if he received the same message you posted.

 

Take it to the local parts store and have the battery load tested.

 

Andynump thank you so much for your thoughtful well documented posts. I look forward to reading them and learn something always.

 

these cars are known to drain batteries. I have a 2022 and the car has gone through 3 batteries since it was purchased originally. These cars are trash. The passenger seat doesn't move more than 1" at a time when using the buttons because the memory doesn't work. The targa top grommets are always falling out and getting lost and chevy takes two weeks to order them in from Michigan. It's a junk car. Go Euro.

 

yes same message the battery charge was depleted

 

No. I keep it on a tender when ever not in use.

 

Took it on a 50 or so mile trip today. No apparent issues. Will call the dealer tomorrow.

 

When my battery died trying to do an OTA update, I got no messages of any type. Dealer charged and it inspected 'good.' Then, Friday when I was returning from the tire store that put on my new wheels, I got an OnStar message saying battery was low, not a general issue like OP got.. Started right up but took a while on the charger to get to half. Took it for a 30 minute drive, and voltage was showing 14.8/.9 volts. Have no idea what was going on, unless for some reason installer left in acc or service mode by mistake while he was working, and why I got no message when battery was dying during (repeatedly) failed OTAs. I think that BCM varied voltage to charge is garbage. Never had an issue with any of my other Vette--'06, 13, 18 and 24.