[MuNkY6913]

I know this is a resurrection but this is the first search I came across that had helpful insight to the position of the sensors. So here is my question. I am hunting down a misfire problem and both bank/ all 4 sensors bad codes. I replaced 2 the other day and noticed something after reading this DIY. Is everyone sure that both the gray sensors go on the same dp? And both the black sensors go on the same dp's. I've had ses light since dp install and I noticed I have the downstream sensors colors swapped. So black and gray on the same dp. Got really bad misfire codes and at points un drivable with misfires in limp mode. Also shuddering at low throttle but increase throttle got rid of that. As long as I didn't go wot for very long it would be ok. Please someone help me with this. After changing 2 sensors and battery unplugged for about 20 mins, it ran great for about 20 mins, not shuttering and no limp mode. Then went back to ses and misfiring. I'm hoping I have the rear sensors installed backwards. Gray with gray and black with black? Thanks in advance.