This has been happening to my wife’s 2014 Spark with a manual transmission. The dealer is pretty much treating this as a driver that doesn’t know how to drive a stick-shift. We are experiencing the same behavior as others have posted, when the car is stopped, the thing just quietly stops running, no warning or indication and it starts right back up with the key. I really need to stress that if it was starving for fuel, like the idle was too low or the clutch wasn’t pressed all the way, the engine would shake the car. That doesn’t happen, it just stops like the key switch was turned to off.
It
