BamaInArk Posted October 20 Report Share Posted October 20 So my 2020 Edge SEL started giving me a battery charge warning several seconds after it's started. I originally noticed it back early last Friday morning when heading out to a doctors appt. Shut the off then restarted and the alert came back on. Went to doctors office which is only like 2 blocks away. When I came out of doctors office I did not get the charge warning again. All fine until this afternoon(Sunday). This time I pulled out my voltmeter and the battery is showing 14 volts so it's apparently getting charged. What the message is "Charging system service now" with the red battery indicator remaining lit. So kinda scratching my head on this one as to whether it's a false warning or not? 1 Quote Link to comment Share on other sites More sharing options...
lildisco Posted October 21 Report Share Posted October 21 They're sensitive. Assuming that you're referring to 14v while running? What's the battery like when the car isn't running for awhile? You're also checking 1/2 the battery, voltage is 1 thing, but amps are another. Assuming that your car hasn't had the battery changed since new, you're fast approaching a replacement. My 2020 started showing signs of a weak battery when the start / stop function quit working. I've now been putting it on a trickle charger when not in use & everything has been working fine on the original battery. I suggest replacing the battery as well as resetting the Battery Monitoring System. Sounds like you're not too far away from being stranded. 1 Quote Link to comment Share on other sites More sharing options...
BamaInArk Posted October 21 Author Report Share Posted October 21 I bought it used about a month ago. First thing I did was replace the battery so it's brand new. Also reset the BMS. And yes the 14v was with it running. I'll have to check it after sitting all night but earlier today it was showing just over 12 volts sitting idle. 1 Quote Link to comment Share on other sites More sharing options...
BamaInArk Posted October 21 Author Report Share Posted October 21 After watching multiple troubleshooting videos on this subject so many things could cause this one. What is the rated output voltage of the alternator supposed to be? It might be because the output is lower than normal. Since I am/was only seeing 14 or 14.1 volts with engine running that could actually be lower than normal which is enough to cause the light/warning to illuminate. Of course that is the easiest check for me. Otherwise there are all kinds of devices and connections that could be the culprit. Luckily I have an extended warranty if needed. 1 Quote Link to comment Share on other sites More sharing options...
BamaInArk Posted October 23 Author Report Share Posted October 23 To revisit this one more time....been driving with the warning intermittent between on and off. I can start driving with the warning showing and then "poof" the battery light goes away. Drive a little longer and "boom" here is comes on again. It seems to have a mind of it's own. I have reverified the battery IS charging and showing 14.5 volts while engine running. Quote Link to comment Share on other sites More sharing options...
Cerberus Posted October 24 Report Share Posted October 24 On 10/22/2024 at 9:00 PM, BamaInArk said: To revisit this one more time....been driving with the warning intermittent between on and off. I can start driving with the warning showing and then "poof" the battery light goes away. Drive a little longer and "boom" here is comes on again. It seems to have a mind of it's own. I have reverified the battery IS charging and showing 14.5 volts while engine running. intermittent charge warning means intermittent charge problems. In other words, when you test it, its fine, but wen the light comes on, its almost certainly not. could be a loose field wire (but unlikely) loose output cable (also unlikely) or a failing alternator. If it makes you feel any better, most mechanics are not good at electronics, and even worse at intermittent problem diagnosis.. if you buy a cheapo cigarette lighter receptacle voltage meter, and plug in in somewhere you can easily see it, you can glance over at it when the light comes on and verify the actual voltage in its faulted condition. 1 Quote Link to comment Share on other sites More sharing options...
BamaInArk Posted October 29 Author Report Share Posted October 29 On 10/24/2024 at 6:34 PM, Cerberus said: intermittent charge warning means intermittent charge problems. In other words, when you test it, its fine, but wen the light comes on, its almost certainly not. could be a loose field wire (but unlikely) loose output cable (also unlikely) or a failing alternator. If it makes you feel any better, most mechanics are not good at electronics, and even worse at intermittent problem diagnosis.. if you buy a cheapo cigarette lighter receptacle voltage meter, and plug in in somewhere you can easily see it, you can glance over at it when the light comes on and verify the actual voltage in its faulted condition. I had considered that possibility from the start. When I checked battery voltage I made sure to check with the warning active to see if it was still seeing a charge....it was. Although now I have a better testing device and see U012D: Lost communication with generator "A" control module, U024E: Invalid data received from generator "A" control module. And sometimes U0284: Lost communication with active grill air shutter. It appears these are related and on the same LIN bus and can cause errors. I just need to figure the app out, Forscan Lite on Android, to monitor battery voltage. 1 Quote Link to comment Share on other sites More sharing options...
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