A flickering check engine light and rough idle on your Corolla Cross usually points to a misfire. Here’s how to diagnose the top culprits and decide if it’s safe to keep driving.
Why the Check Engine Light Flickers
A steady check engine light often means something like a loose gas cap or an oxygen sensor, but a flickering or flashing light is a different animal. On most vehicles, including the Corolla Cross, a flashing light is the computer telling you that a cylinder is misfiring often enough to send raw fuel into the exhaust, which can damage the catalytic converter. If your light only flickers every so often and the idle feels rough, you're likely dealing with an intermittent misfire.
