The check-engine light means the car’s computer has stored a fault code. It can be as simple as a loose fuel cap or as serious as a misfire.
Steady or flashing?
- Steady: book a diagnostic check soon. The car is usually safe to drive.
- Flashing: reduce speed and get the car checked as soon as possible. A flashing light often means a misfire that can damage the catalytic converter.
A diagnostic check reads the code and finds the cause, so you only pay for the repair you actually need.