Low Fuel Warning (Reserve Light)
The low fuel warning light comes on when the fuel level falls to the reserve amount.
What is Low Fuel Warning (Reserve Light)?
The remaining reserve differs between models. Many cars show an estimated remaining range. The range estimate depends on recent driving. Hybrid and plug-in cars show separate warnings for fuel and battery.
How it works
The control unit compares the sender signal with a threshold and switches on the warning.
Why it matters for your car
Refuel soon after the warning comes on. Running the tank dry can damage the fuel pump and, in diesels, let air into the system.
Other terms
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