Two codes po301& po301 pd

On my pocket scan there’s another code that says 301 but we’re the arrows are there’s this pd right next to it. What does that mean ? Can anyone tell me. Thx

 

Thank you.

 

Ok I had the spark plugs changed and the coils. The engine shakes when I first start the car and when take off from being at a dead stop and that’s the only time it shakes. Had a code of 300,301,302 and 420. Engine light was on but now has gone out but the engine still shakes. Once in awhile the light will come on and blink then turn off. What can it be ???