nodemcu pins + sensors reading values
The ESP8266 doesn't have a hardware Two Wire Interface. I²C is done in software, so you can use any 2 pins, as long as you specify them in your code using Wire.begin(SDA, SCL).

My guess would be that there's another problem. 65500+ sounds like an integer overflow, for example. ((uint16_t) -1 == 65535)