Check-engine light: what to do before you drive on

Dashboard warning lights are not decoration. The check-engine lamp, in particular, is a coded message from the engine control unit. Ignoring it can turn a sensor fault into expensive exhaust damage.

Steady versus flashing

A steady light usually means a fault is stored and should be read soon. You may continue carefully to a workshop if the car drives normally. A flashing light often signals active misfire that can overheat the catalytic converter. Reduce load, avoid high revs, and arrange diagnostics without delay.

What to tell the garage

• When the light first appeared
• Whether it is steady or flashing
• Any loss of power, rough idle, or unusual smell
• Recent fuel fill-ups or unfinished repairs

Book an engine diagnostics slot and note those details on the form. Clearing the code without finding the cause is not a repair. Ask for the fault code and a plain-language explanation before approving further work.