Amber light
Key Battery Low
The battery in the remote key or keyless entry fob is running low.
Normal risk
Replace the key battery soon. With a flat battery the car may not unlock or start without the backup method.
Short answer · What if my key battery dies completely?
Most cars have an emergency method: a mechanical key blade for the door and a marked spot where you hold the key to start the car. The handbook shows where it is. Replace the battery soon to avoid this.
What to do
- Replace the batteryMost keys use a coin cell; the type is printed on the old battery or listed in the handbook.
- Learn the backup methodFind where to hold the key to start the car with a flat battery.
- Check the spare keyIf the warning appears with both keys, the receiver may be at fault.
How is the light behaving?
| What you see | What it usually means | What to do |
|---|---|---|
| Steady | Key battery low | Replace the battery soon |
Possible causes
- Old key batteryCoin cells usually last a few years.
- Key kept near other electronicsConstant signals can drain the battery faster.
- Faulty keyRarely, the key itself draws too much current.
Don't confuse it with
Questions about Key Battery Low
Do I need to reprogram the key after changing the battery?
Usually not. Some cars need a simple resynchronisation described in the handbook.