code p1258 on 2005 Cadillac CTS

my car overheated after i cracked the radiator on an ice bank. i had the radiator fixed but there is a code p1258, that is coming up. does anyone know about this?????

Asked by for the 2005 Cadillac CTS
DTC P1258 - engine coolant temperature is more than 131°C (268°F). When the engine is overheated, DTC P1258 will set. The PCM will disable two groups of four cylinders by turning OFF the fuel injectors. By switching between the two groups of cylinders, the PCM is able to reduce the temperature of the coolant.
Have you reset the code and if so, did it come back on?
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code p1258 engine over tempurature
.check low an antifreeze it is most problem or leaking some time,then reset computer.