I'm getting this code come up on my tuner. Just wondering if anyone out there knows where this sensor is located so I can inspect some wiring. This is on a 2008 f450 with a H&S mini max tuner. I have my deletes done through the tuner but still have my egr valve and coolers still on the engine. I've been running this setup for about a year now and haven't had any issues at all.

Any input on this circuit would be awesome.

Thanks.