A flickering check engine light and rough idle on your Volvo V60 II usually point to an engine misfire.
Here’s what to check first, and when it’s safer to stop driving.
What a flickering check engine light really means
On your Volvo V60 II, a check engine light that flickers or flashes is different from one that stays on steady. A steady light says the car found a fault, but it is not an emergency. A flickering light usually means the engine is misfiring badly enough that unburned fuel is reaching the catalytic converter. That can overheat and destroy the cat, so I treat a flashing CEL as a 'stop soon' warning, especially if the idle is rough, the engine shakes, or you smell fuel.
