Incredible Honda Civic Check Engine Light Flashing Rough Idle Ideas. The flash and loss of power is almost certainly a limp home mode: Tighten them if they are.
Rough vibrations coming from the engine while idling, especially when the ac is on. A steady light typically indicates a problem with the vehicle's computer system, such as a sensor that is not delivering or receiving the correct data needed. Web let the engine cool, and put on rubber gloves.
