Xcent Battery Discharging Heavily

Hello. I also own a Hyundai Xcent, and I had a similar problem not too long ago. The symptoms you describe, especially the error message and the weak battery, point towards a potential issue with the battery sensor. It's a small component that monitors the battery's health and reports it to the car's computer. When this sensor malfunctions, it can lead to excessive battery drain and those error messages you're seeing. Have you checked the voltage of your car battery, ideally both when the car is off and whilst it's running? A healthy car battery usually reads around 12.6 volts when off, and between 13.7 and 14.7 volts when the engine is running, due to the alternator charging the battery.

Thanks for the info! That's really helpful. I haven't checked the battery voltage directly, but I'll try to do that soon. Where exactly is the battery sensor located? Is it something I can replace myself, or is it better left to a professional?

I understand your concerns. The battery sensor on the Hyundai Xcent is usually attached directly to the negative terminal of the battery. While it might seem like a simple part to replace, it's often integrated with the battery monitoring system (BMS) of the car. The BMS ensures optimal charging and prevents overcharging, so a faulty sensor can cause problems with this system. If you are not skilled in repairing cars, it is advisable to have it diagnosed and, if necessary, replaced by a workshop. I went to a trusted workshop.

Thanks again for your help! I took it to a workshop as you suggested, and it turned out that the battery sensor was indeed defective. They replaced it, and now everything is working perfectly. The repair cost me around 315€. I really appreciate your advice!