In this guide 6 sections
Stop safely and read the vehicle instructions
The engine may stop when the available electrical energy is depleted. With overheating, heavy steering or a burning smell, do not continue driving; seek assistance.
What does this light mean?
The indicator with plus and minus signs monitors the charging system in combustion-engine vehicles. Appearing before the engine starts may be normal; remaining on afterwards or appearing while driving requires action.
The light appeared while the engine was running
Note your location and contact roadside assistance for guidance. There is no guaranteed distance you can travel on the remaining charge.
The vehicle will not start
Avoid repeated attempts. Battery and charging tests help identify the next step; jump-start only using the method permitted by the vehicle manual.
Practical steps before inspection
- Record whether the light appeared alone or with overheating, belt noise or a change in lighting.
- Switch off unnecessary equipment when needed, while keeping lights, wipers and everything required for safety operating.
- Request checks of the charging system, connections and battery together. Do not disconnect a battery terminal with the engine running to test the alternator.
A question that changes the decision
Does the same explanation apply to an electric vehicle?
Not completely. A 12-volt battery warning differs from traction-battery charge level and high-voltage system warnings. Consult the model manual and do not touch high-voltage components.
Guides related to this signal
Weak car battery? Understand the test before deciding to replace it
Signs of weak starting, the difference between state of charge and battery health, and what to ask an automotive electrician.
Battery light on while driving: causes and next steps
A battery light with the engine running usually warns about the charging system, rather than simply signalling battery replacement time.
Sources and scope of this guide
Prepared with reference to the sources below on 12 September 2026. Manufacturer recommendations are examples for their models; your vehicle manual and display message take priority.
The icon is illustrative and may differ from your vehicle's. This explanation helps you take an initial step; it is not a remote diagnosis or permission to continue driving. Do not open the page or photograph the display while driving.