A flickering check engine light with a rough idle on your CX-9 often points to misfires or vacuum leaks. Here’s what to check first and when it’s safe to keep driving.
What Your CX-9 Is Trying to Tell You
When the check engine light flickers rather than staying steady, and the idle feels rough or shaky, your Mazda CX-9 is usually experiencing intermittent combustion misfires. A flashing or flickering check engine light typically means the engine control module is detecting enough misfires to potentially damage the catalytic converter. That doesn't always mean you need to pull over immediately, but it does mean you should get the codes read soon. The rough idle often shows up at stoplights or in park, while the engine may feel fine at speed.
