* Misfire: This is the most likely culprit. A misfire occurs when one or more cylinders aren't firing properly. This can be caused by several things:
* Faulty spark plugs or wires: These are common wear items and a frequent cause of misfires.
* Bad ignition coil: The coil provides the high voltage to the spark plugs. A failing coil can lead to misfires in one or more cylinders.
* Damaged or clogged fuel injectors: If fuel isn't being delivered properly, that cylinder won't fire.
* Low compression: A problem with the engine's mechanical components can lead to low compression in a cylinder.
* Catalytic Converter Problems: A malfunctioning catalytic converter can cause a misfire, leading to a blinking SES light. A damaged converter can restrict exhaust flow, leading to engine damage.
* Other Sensor Issues: While less likely to cause a *blinking* light, severely faulty sensors (like the oxygen sensor or mass airflow sensor) can contribute to misfires and ultimately a flashing light.
Crucially: Driving with a blinking SES light can cause significant engine damage. The misfire can lead to overheating, catastrophic engine failure, and potentially damage to the catalytic converter.
What you should do:
1. Do NOT continue driving. Get the vehicle towed or have it transported to a mechanic immediately.
2. Have the diagnostic trouble codes (DTCs) read. A mechanic can use an OBD-II scanner to read the codes stored in the car's computer. These codes will pinpoint the specific problem.
3. Repair the identified issue. Once the problem is diagnosed, have the necessary repairs made promptly.
Ignoring a blinking SES light can be expensive. Addressing the problem quickly is the best way to prevent further, and potentially more costly, damage.
