Causes of “Check Hybrid System” dashboard warning:

There are a variety of issues that can cause this warning to appear. Using a diagnostic tool can help you determine the cause.

• Inverter problems – The inverter is responsible for converting DC energy into AC energy. To function properly, it must be kept cool. If it isn’t working correctly, your car’s hybrid system may not be able to function at full capacity. This problem can be related to overheating, which is caused by low inverter coolant or a malfunctioning cooling system.
• Blown fuse – The hybrid battery is connected to a fuse. If this fuse fails, the battery will stop working. Fortunately, replacing the fuse is usually a simple task.
• Battery cell(s) not working – If you notice a warning light, as well as the hybrid battery’s state of charge fluctuating from empty to full rapidly, your battery pack may have a malfunctioning cell in one of its modules.
• 12V battery in need of replacement – Sometimes, problems with your car’s 12-volt battery can cause hybrid-related warnings to appear. This is often accompanied by problems with the cars electrical accessories (lights, radio) or your car not starting.