migueldosantos77 Posted August 13 Share Posted August 13 Yesterday, I brought my CX90 in for a recall, its first oil change, and a couple of Technical Service Bulletins (TSBs). I also informed the service representative that the vehicle sometimes experiences surges while coming to a halt. They completed the simple tasks and, unsurprisingly, claimed that they did not see any problem with the sudden increase and provided me with an explanation that it was connected to the process of recharging when the battery was completely drained. He verified this by completely depleting the battery, after which he informed me that they had recharged it to 50 percent and it was prepared for me to collect. After driving 40 miles to the dealer and back home, the battery of my vehicle was completely depleted. I immediately connected it to a power source and around one hour later, I received a notification indicating that the car had been fully charged. Subsequently, the car remained in a charging state until it reached full capacity. My wife was ready to go for the store, so I didn't pay much attention to it at the time. However, I did see that the battery charge level was only at 50 percent or 13 miles State of Charge (SOC). Upon returning home, she proceeded to recharge her device. However, she had the same issue where the device reached a 50 percent charge and continued to charge again. When I check my Emporia app, I see a recurring pattern where the amperage drops to zero, then rises to 30 amps almost every minute after the battery reaches 50 percent charge. My EV6 is now charging without any problems. The issue first arose after the automobile was sent to the shop. It seemed peculiar that I received charging warnings at 7:00 this morning while the car was being serviced, and this continued for around 10 minutes. Has anybody else seen or experienced this issue? Did they deplete half of my battery? Quote Link to comment Share on other sites More sharing options...
migueldosantos77 Posted August 13 Author Share Posted August 13 The issue has been resolved. The recall now establishes a maximum charge restriction of 50 percent for both AC charging and charging while driving. I am unable to comprehend the reason for the erratic behaviour of the charging process when it reached 50 percent instead of just ceasing to charge. The image shown above shows that the charging progress reached 61 percent. Quote Link to comment Share on other sites More sharing options...
honeycut_mazda5 Posted August 13 Share Posted August 13 It seems that the dealership is exhibiting a lack of effort or motivation. This TSB provides information on the issue of surging and how it may be resolved with a software update. Quote Link to comment Share on other sites More sharing options...
honeycut_mazda5 Posted August 13 Share Posted August 13 https://static.nhtsa.gov/odi/tsbs/2024/MC-11000672-0001.pdf Quote Link to comment Share on other sites More sharing options...
migueldosantos77 Posted August 13 Author Share Posted August 13 Surging occurs while decelerating to a halt. With the foot on the brake, the automobile abruptly accelerates forward approximately 10 feet before coming to a complete stop, requiring the driver to forcefully use the brakes. The situation was rather unsettling, and the reaction I received was exactly what I anticipated. Although it is not a problem, we are aware that it is really a problem. Please go. Quote Link to comment Share on other sites More sharing options...
Gianni682 Posted August 13 Share Posted August 13 Research the Technical Service Bulletin (TSB). Although I do not own a Plug-in Hybrid Electric Vehicle (PHEV), I recall seeing a similar set of symptoms that could be relevant to your situation. It was a brief and urgent announcement. Quote Link to comment Share on other sites More sharing options...
mrnobady Posted August 13 Share Posted August 13 I just had my recalls addressed, and I can confirm that the issue has been resolved. Quote Link to comment Share on other sites More sharing options...
honeycut_mazda5 Posted August 13 Share Posted August 13 Was the update completed? I performed the task on my spouse's plug-in hybrid electric vehicle (PHEV), resulting in a significant improvement in the smoothness of the drivetrain. Quote Link to comment Share on other sites More sharing options...
CelestialSeeker Posted August 13 Share Posted August 13 Thank you for your first post and further follow-up. It is good to have knowledge about problems and avoid being caught off guard. Quote Link to comment Share on other sites More sharing options...
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