The sensor doesn't seem to acknowledge I2C communications when its address pin is tied high and software I2C with the address 0x41. With the address pin tied to ground and a software I2C address of 0x40, it works. It has been powered at 3 V and 3.3V with the same results.
If I could, I would change the address pin connection, but the hardware I have has the address pin tied to VDD. What am I missing?