A blinking or flashing engine light usually indicates a serious issue with the engine, most commonly an engine misfire. This means one or more cylinders are not igniting properly, which can be caused by faulty spark plugs, ignition coil problems, fuel mixture issues, or low compression. Driving with a flashing engine light can cause further damage, including harm to the catalytic converter, so it requires immediate attention from a qualified mechanic. Other possible causes include problems with the oxygen sensor, fuel system, catalytic converter, or a loose gas cap, but the flashing light is primarily a warning of a potentially severe engine problem.
Key causes of blinking engine light:
- Engine misfire due to ignition issues, fuel mixture imbalance, or low compression.
- Catalytic converter malfunction.
- Oxygen sensor failure.
- Loose or damaged gas cap.
- Fuel system or ignition system problems.
What to do:
Stop driving if the check engine light is flashing and get the vehicle checked promptly by a mechanic to diagnose and repair the underlying issue to prevent further damage.
