Because the ignition switch is defective.
If not, then you may be be "dieseling" - meaning run on of the engine - that is BAD and you have to find out why it is doing that - usually something is misadjusted in the engine's carburetor or fuel injection system (usually a mechanical control)
what year ? if it is say 2000 sportage with double overhead cam, possible real damage done, this IS an interference engine. In english, if timing belt breaks while engine is running severe damage can be done to valves, cams, pistons,etc. A $50.00 timing belt could easily cost you now $2500.00 to repair engine. If it just broke sitting still and NOT running, $ 458.00 to fix ,include water pump , it is driven by timing belt.
Because it's in park.
If the engine is running it is using fuel.
Depends. An older Diesel is likely to keep running. A modern, with a full set of electronic engine diagnostic might not.
Yes it will, engine coolant still flows through it when engine is running.
??? i have a work truck that is 600,000 plus and still running ???
I believe you are "standing", not parked.
I have 250,000 and still running.
yes. you are still moving in a direction, and the wheels are still spinning, and the engine is still running, and the transmission is still being used.
The engine coolant fan can keep running after the engine is turned off in any car because the temperature gauge is in the radiator. As long as the radiator is still hot, the fan will keep running until the temperature gauge says it has cooled enough.
I've seen this happen in Honda's. Does it remain running for long periods of time or never shut off? If it is only running for a short time, it's cooling off your engine still because it's still really hot. There's nothing wrong with this.
The main reason for performing a dyno test on an engine is to make sure the engine is running smoothly after changes have been made. When you adjust things like fuel and air, you still need to make sure the engine is running properly.