I got the stubborn camshaft/crankshaft mis-correlation check engine light.

Is the chain tensioner is supposed to lock once it extends and not be able to be retracted??

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Can someone tell me if my chain is loose or functioning normally from these videos. I don't know what to think of the chain tension.

If I apply force I can pull down the chain a significant amount, but I don't know if I am introducing this play by pulling the extended chain tensioner back inside .

Chain in natural state:
dropbox.com/s/590n2kkphpwxjsg/Tight%20chain.mov?dl=0

Retracting chain by force:
dropbox.com/s/ztk7swevka9yomg/retractinf%20chain%20.MOV?dl=0

Loose chain after retracting:
dropbox.com/s/z6p16k2sbchqjmy/Loose%20chain%20.mov?dl=0

Idle: (sounds normal)
dropbox.com/s/jbsv7bfv3sxyww8/Idle.mov?dl=0

The chain tightens up when the engine is rotated.

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Trying to fix the code I already replaced the following
-Camshaft position sensor
-Crankshaft position sensor
-Solenoid that supplies oil to camshaft phasor (camshaft position actuator solenoid)

I also disconnected each of the above individually and that threw different codes so the electrical is working fine.

Timing marks on both cams were aligned with the dark links.

Good maintenance / oil wasn't dunked up.

The chain or phasor are the only two things remaining, but I don't want to pull the front cover if I don't have too.

 

The tensioner has a ratcheting mechanism on it so once it's extended to take up slack, it cannot retract (without you pulling up on the release lever on the front of it). By the way, only your first video plays.