code 15 88 s-10 blazr 4.3L TBI

15Coolant temperature sensor signal indicates a temperature colder than -27° F for 30 seconds after the, engine has been running for at least 30 seconds.

could this be a bad temp sensor? notice the -27 degrees ...how ccan it come up with a reading like that cold...the light goes out after a few minutes driving, intermediate code

Check either the sensor or the wires leading to them.