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The engine began sputtering and then it went dead.
White smoke is a good indication you have a blown head gasket. And/or a cracked head. Did you noticed, when it happened that the engine started running rough? Best i can do with little info.
Have the engine tuned.
On a Mazda tribute, the car with a key light indicator means that the engine is started.
when my dodge stratus started to do that it was because I needed transmission fluid.
Not running on all cylinders? Bad plugs, wires, or valve? Try a compression test to see if problem is internal to the engine
Have the OBDII connector scanned. The trouble code(s) will tell where the problem lies.
Nothing provided the engine is not started up. With no oil, a running engine would eventually seize up.
I sometimes sputter when I'm nervous. Please reword the question and tell me what year and engine and describe what you are doing with the car when "sputtering" occurs. Would help if you can think of additional description of what you mean by "sputtering".
ggd
What kind of car?
Have vehicle scanned to determine problem