Originally Posted by Pocket

If you can't pull the IDM codes at the moment, your best best is to first check the UVC harnesses. They are located in the middle of each valve cover and each face the valley of the engine. You'll either have chaffed wires from a failed harness, or the clip underneath the valve cover popped off. For that you'll have to take the valve covers off and reconnect. They come off surprisingly easy.

Hope this helps.