I don't know if you found a solution yet, but I have had to modify a device's library files when I had the same problem.

I have used this:

#define SDA 23
#define SCL 19

and

Wire.begin(SDA,SCL);

Doing so, you can assing the lines

I have the same problem; i have two codes, one for two I2C sensors, and works fine; I have a code for the LCD and also works fine. When I mix them, the LCD initializes properly, the sensors give valid data, but they can not be displayed at LCD. I guess that is not a problem of SDA/SCL lines, since ...