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Dashboard warning lights: what they mean

Updated 22 Oct 2026

The colour tells you how urgent it is. Exact symbols vary by car, so check your owner's manual if you're unsure.

Red: stop as soon as it's safe

  • Oil pressure (an oil can): stop and switch off. Driving without oil pressure can ruin the engine.
  • Engine temperature (a thermometer): the engine is overheating. See engine overheating.
  • Brake warning: the handbrake may be on, or the brake fluid is low. Don't ignore it.
  • Battery / charging (a battery): the battery isn't being charged. You may only have a short time before the car stops.

Amber: get it checked soon

  • Check engine (an engine outline): many possible causes. A computer diagnosis reads the fault code. If it flashes, reduce speed and get help soon.
  • ABS: normal braking still works, but anti-lock braking may not.
  • Airbag: the airbags may not work in a crash.
  • Tyre pressure: check all four tyres, including for a slow puncture.

Green or blue

Information only: headlights, indicators, cruise control.

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