A flickering check engine light with a rough idle on your Changan CS55 Plus usually points to an active misfire.
Scan the codes and check plugs, coils, and intake leaks before driving hard.
If your Changan CS55 Plus has a check engine light that flickers intermittently while the idle feels rough, treat it as a real misfire warning rather than a cosmetic glitch. A flashing or flickering CEL usually means the engine computer has detected misfires severe enough to risk overheating the catalytic converter, so it is not the same as a steady light caused by a loose fuel cap.
