Flashing Check Engine Light
A flashing check engine light is different from a steady one. It means the engine is misfiring badly right now.
Should you keep driving?
A flashing light means raw fuel is reaching the catalytic converter and can ruin it. Reduce speed and get it checked immediately.
Common causes
Severe misfireOne or more cylinders are not firing — usually ignition or fuel related.
Failed coil or plugA dead coil pack or fouled plug is the most common trigger.
Fuel delivery faultA clogged injector or fuel-pressure problem can cause a heavy misfire.
Compression lossLess common, but a mechanical problem can also flash the light.
Not sure which one it is?
Describe what your car is doing and our free AI diagnostic will help narrow it down — then connect you with a vetted local mechanic if you need one.