For starts when was the last time you did tuneup to the car?
Code 0215 it looks like engine shutoff solenoid, may be bad solenoid or short on wires or ignition switch.
Most likely it might be the gas filter, the gum from the gas is sticking to the filter and restrict the flow.
Some times is a vacuum hoses disconnected or cracked.
GOOD LUCK :-)
If you have the 99 -02 Cougar replace the TPS (throttle positioning sensor) on the throttle body.
Symptom of bad fuel filter= stalling when slowing down to stop at lights or stop signs.
I just put a new battery and alternator in my car, but when i put it in gear or start slowing down to stop..the car die out. Also the brake light is continely on.
The steering wheel shimmering could be warped front rotors, when slowing down. The stalling when slowing down could be a bad fuel filter.
If it is a stick shift or manual, you may be stalling it. a way to stop this could be to place the clutch all the way to the floor.
I would check for any fault codes first with an obd tool, is the check engine light on?
slowing down.
A solution for slowing down the process or to stop it completely is to send suggestions for laws to protect animals. We can also stop buying jackets or anything else made from animal parts.
Transmission may not be downshifting properly or one of the belt driven acessories could be putting to much load on engine. See if it happens with A/C, defroster and vents off, if not it could be your A/C compressor stalling the engine
its when something is slowing down
Gradually slowing down is 'decelerating'.
Stalling when stopping can be a sign of a bad lock-up torque converter solenoid. But if it stalls while in park, it may also be a very bad vacuum leak, especially if it idles rough. I am assuming it has good plugs and plug wires.