A flickering check engine light with rough idle usually points to an engine misfire, often from ignition or intake faults. Scan the ECU first, then check plugs, coils, and vacuum leaks before driving hard.
What a flickering check engine light means
On your Suzuki Ertiga II, a flashing or flickering check engine light is more urgent than a steady light. It usually means the ECU is detecting a misfire—unburnt fuel is reaching the catalytic converter, which can overheat and fail. A rough idle alongside it supports this. Don’t ignore it; get the fault codes read soon.
