Originally Posted by richc22a
I have the same system, it will not throw a code as it is transfering fuel from one tank to the other. It is the same as filling the truck while idling at a pump.
Thank you Sir!!! That is the information I have been searching for. With as many miles as you have on your rig, it surely would have thrown a code if it was going to. I have been afraid to leave the valve open for fear of it throwing a code and putting the truck into limp mode while I was on a desolate stretch of road, and I have been across a few of these.