KEEPS MISSFIRING IN CYLNDERS 4 5 6

try spraying those spark plug wires with WD-40...is a water displacer and will stop the shorting to ground (that you cannot see)~

You may have dirty injectors or the ECM is only grounding those at certain times. First try a bottle of seafoam injector cleaner. The type you pull a vacuum hose off from the intake and put down in the can. See if this works.

let us know

also conceder a vacuum leak at intake on that side, check fuel trim on scanner ,try suggested other stuff first ,I'm asking beyond DIY maybe.

Yes jimmy is correct if 4 5 6 are on the same side a vacuum leak could possibly set these codes too.