From the response,
so the cause of low power mode is the temperature and voltage is outside the operational limits.
You can further check AT!PCVOLT? and AT!PCTEMP? to find the current temperature and voltage level detected by module and the state.
Please refer to PTS and use AT!PCVOLTLIMITS? and AT!PCTEMPLIMITS? to check the voltage/temperature requirement and see if normal operational environment can be achieved.
In worst case, if the environmental behavior cannot be changed, you may modify the setting via these two commands but use with patient as which may damage the module, please refer to Extended AT command guide or contact your FAE/distributor for info.