Cadillac Deville 95

Common cause for a stall, and no restart after warm is a faulty ignition control module. When it stalls and won't start, check for spark. You can do this by pulling an easily accessed plug wire(plug end), insert a screwdriver in the boot, and hold it close(3/16 inch or so) to a good ground, have a second person crank it, and check for arcing. Do not have too much gap or you may be the ground path, and you will get a jolt if spark is present.

The codes P015 is open coolant temp sensor, and P053 is distributor signal interrupt. The latter of which could be indicative of the ignition control module. If the coolant temp sensor is open, unplugged, or faulty, you may not necessarily have a stall and no restart, but you will have a rich condition and poor running, as open circuit tells the PCM it is -40 degrees.