What it means
A flashing malfunction indicator commonly warns of an active fault such as a severe engine misfire that can quickly damage the catalytic converter. Treat it as urgent; the colour and exact meaning of flashing vary by manufacturer, so check the owner's manual.
What the symbol looks like: An engine outline, often with a small jagged line inside, flashing on and off.
Why it comes on
- Engine misfire from a failed spark plug or ignition coil
- Fuel injector or fuel supply problem
- Air leak or other mixture fault causing a severe misfire
- Engine or emissions system fault detected under load
What to do
- Ease off the accelerator and avoid heavy engine load.
- Pull over somewhere safe as soon as you can.
- Switch off the engine if the light continues flashing or the engine is shaking or running roughly.
- Arrange roadside assistance or a diagnostic inspection; tell the repairer the light was flashing.
Can I keep driving?
Do not continue a normal journey while the light is flashing, especially if the engine runs roughly. Avoid acceleration and towing; move only as far as needed to reach a safe stopping place.
Symbols and colours differ between makes and models. Your owner’s manual shows the exact lights of your car.