05 Ram 1500 4.7l 4x4
Engine codes P0138, P0138PD and P0420
I cannot find what P0138PD stands for. Would the other codes cause engine to run like it has a bad plug and or coil? Also, when driving along at steady speed ( Doesn't matter what speed ), truck hitches. Speed up a few km/h at it stops for awhile.

 

Think I would check/change the O2 sensor it is whining about, clear codes, and see what comes back. If anything.

 

Thank you. I will give it a try.