Why does the start-stop system not work after replacing the battery in the Excelle?
2 Answers
After replacing the battery in the Excelle, the start-stop system may not work due to battery model or quality issues. Below are some relevant tips on car battery maintenance: 1. Drive frequently: Do not leave the vehicle unused for long periods. Drive it regularly to keep the battery fully charged. 2. Prevent battery drain: Turn off lights before shutting off the engine, minimize the use of charging devices in the car, and prevent battery drain. 3. Regular inspection: Have the battery's charging capacity checked at a 4S shop every six months. 4. Regular cleaning: Wipe the battery periodically to prevent the buildup of corrosive acid powder.
I drove a Buick Excelle for several years, and the start-stop function stopped working after the last battery replacement. It took me a while to figure out that replacing a new battery is no small matter. The start-stop system is quite picky—it requires a specific type of battery, like the original AGM or EFB type, which can withstand frequent starts and discharges. If you just buy a regular lead-acid battery, its capacity or discharge rate might not keep up, and the system will automatically disable the start-stop function to protect the battery. Additionally, even if you replace it with the correct battery, the car's computer might not recognize it, requiring a visit to the dealership to reset the battery data using a diagnostic tool. I tried disconnecting the negative terminal and reconnecting it after a few minutes, but it didn’t work—probably because the system needed to relearn. Loose or improperly tightened connections during replacement can also trigger a poor-contact warning. In short, don’t delay—first check if the battery label matches, then get it sorted at a professional shop. After all, start-stop issues can hint at underlying risks, like battery overheating or engine abnormalities.
