I just installed a AEM x-series wideband kit in my '11 X. All good on the install, gauge fires up. Then I made the super simple serial cable per the Cobb guide (Blue from AEM to brown wire, black from AEM to yellow serial wire). I fired up Accesstuner Race and selected the "AEM UEGO AFR GAUGE" and the correct Com port.

When I go to live monitor the value it is not matching up with the AFR displayed on the gauge. My gauge will read 14.5-15 at idle, but ATR is showing a value of 10.00 and not even moving around that much.

The serial cable is using the same ground as the AEM gauge (I ran both ground wires to a spade connector to avoid any ground difference) so I am not sure what is going on or where to start looking for a solution

Any ideas? Seemed so simple but not sure what's going on. Aside from that I just should move over to Evoscan and dump ATR lol.