What is what does it mean when check engine light flashes?

A flashing check engine light indicates a serious problem that requires immediate attention. It often signifies a misfire (https://www.wikiwhat.page/kavramlar/Engine%20Misfire) occurring in one or more of the engine's cylinders.

When a misfire happens, unburned fuel can enter the exhaust system (https://www.wikiwhat.page/kavramlar/Exhaust%20System), potentially damaging the catalytic converter (https://www.wikiwhat.page/kavramlar/Catalytic%20Converter). This is because the catalytic converter is designed to burn off harmful emissions, but it can't handle raw fuel efficiently and may overheat and melt.

  • Stop driving as soon as safely possible: Continued driving with a flashing check engine light can cause further damage to your vehicle, especially the catalytic converter, which can be a costly repair.
  • Have your vehicle inspected immediately: A qualified mechanic should diagnose and repair the issue as quickly as possible. They will use a diagnostic scanner to read the engine's computer and identify the specific problem code(s) triggering the flashing light.
  • Common causes: Besides misfires, a flashing check engine light could be caused by other severe issues, although misfires are the most common reason.