A flickering check engine light with a rough idle on your Audi A6 C8 usually points to an active misfire.
Here’s what to check first and when it’s safe to keep driving.
If your Audi A6 C8 has a check engine light that flickers intermittently and the idle feels rough, you're right to pay attention. On this generation, that combination almost always means the engine is misfiring — one or more cylinders aren't burning fuel properly. The flicker is the ECU's way of saying the misfire is active and potentially damaging your catalytic converter. A steady light is less urgent; a flashing or flickering one is a red alert.
