Are you sure you calibrated Hondata to your mods and uploaded it correctly? You shouldn't be having these error codes if your calibration was uploaded successfully to your ECU.
No sensors to order. The harness is plugged directly into the OBD-II port reading data from the PCM. The readout can be changed depending on what you want to check by pressing one of the buttons...
Mine wasn't supposed to arrive until next month according to their website but I just got a "out for delivery" notification. I guess they had a few left in stock.