From your other posts you have a 3.6 engine - so if 4, 5, and 6 have misfires then it's maybe two cams, VVT, or ignition troubles.

P 0019 - "Crankshaft position - camshaft position correlation Bank 2 sensor B"

 

It's only the exhaust cam throwing the code. And it rattles.

 

This would indicate that you have a bad cam actuator that controls cam timing. It may not be a chain problem at all.

 

Can I change the phaser without pulling the timing cover?

 

You'll probably have problems verifying the timing marks on the chains and the gears. If you get it wrong you can scramble all the valves.

 

Did you fix it code. P0019. An was it the cam phaser

 

Mine is rattling to I believe it’s the phaser that’s what the noise is because it’s not on time and won’t lock so u hear the snap as the engine spins but sounds like rattle becsuse it supper fast spi. The engine by hand and see if u hear a noise like a pop. Cause mine is doing the same thing