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A flashing service light (called a MIL or malfunction indicator lamp) indicates misfiring has been detected. DO NOT DRIVE THE CAR $$$$$. Get the misfiring repaired, could be bad coil or coil packs, bad wires, bad plugs. Driving with misfire can destroy the catalytic converter.

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Q: What would cause a vehicle to jerk while driving down the road and after turning off vehicle it won't crank the does not crank also engine service light come on and off at the time when driving?
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