Wideband/COBB Accessport

I have a Subaru WRX that has a AEM wideband O2 sensor. I wasn't able to finish a tune for my car because my tuner said I had to configure my wideband to display on the COBB Accessport reflashing software for WOT tuning. I had already bought the car installed with the wideband and wasn't sure how to check to see if the data is presented by the Accessport. Though it does show AF ratio sensor 1 AFR values, i'm assuming this is probably the OEM sensor and not the wideband configured downstream. Since, the wideband is installed in the OEM downstream sensor bung, should I follow the data presented by that? I hope these questions make sense and any help would be greatly appreciated as my car does run extremely rich during WOT pulls.

The AEM Uego should have 4 wires. 12VDC, Ground, Serial, and 0-5VDC. What you need to do is look up the wiring diagram for your model and find diagram for the rear O2 sensor. One of the wires going to the rear O2 sensor will the factory 0-5VDC sensor wire. (I believe it is shielded so that should help narrow it down). You will need to cut that wire and crimp in the AEM Uego 0-5VDC output to the factory 0-5VDC sensor wire. Once that is complete you or your tuner will need to go into the accesstuner software and enable the rear O2 sensor only by entering the calibration data from AEM and selecting the rear O2 sensor.

Things to check first:

1. Make sure you don't have anything else being monitored using your rear O2 sensor input (most likely not).

2. Determine if you have the 4.9 or 4.2(?) AEM wideband sensor. The probably have different calibration curves. I believe you can tell them apart by the AEM Wideband plug shape/number of pins.

Good luck,

There should be some videos on youtube that will walk you through most of this process. Be sure to check wiring diagrams for your specific model though as wire colors have changed slightly throughout the years.