okay so when i plugged my hypertech in it gave me this code i looked it up and this is what it means:
Possible causes
- Heated Oxygen Sensor (H2OS) Bank 2 Sensor 3 circuit open shorted to ground
- Heated Oxygen Sensor (H2OS) Bank 2 Sensor 3 circuit poor electrical connection
- Faulty Heated Oxygen Sensor (H2OS) Bank 2 Sensor 3 circuit
- Heated Oxygen Sensor (H2OS) Bank 2 Sensor 3 circuit fuse
- Faulty Engine Control Module (ECM)
Tech notes
The code means that there is a problem with the heater element circuit of the heated oxygen sensor. Water getting inside the heated oxygen sensor connector can caused the heated oxygen sensor fuse to blow, which is a very common problem for this type codes. Before replacing the sensor, check for the condition of the heated oxygen sensor fuse and connectors.

im curious if anyone knows where bank 2 sensor 3 is in my truck and if this code is a serious problem. and what are the ways i can fix it ( i would assume just replaceing the sensor but who knows)

thanks
Zach