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VCDS MB 091 and 093

ROH ECHT

K04 PLAY
Location
PDX OR
Car(s)
2007 MKV GTI
*If you have pics of your own MB 981 & 093, feel free to post the pic or add the data and share what was found to be the fix.*

Just seeking some confirmation on what the MB 091 and 093 mean.
I thought 091 shows if the timing belt and chain are all mounted correctly. And that the VVT is working to keep both cams where they should be. VCDS MB 093 reflects where the intake cam is in relation to the crankshaft. If you can make any corrections to my recollection of this all...please do so.

I made an attempt to help someone but I am not sure what their data points to in regards to their problem. But I am a bit stumped. I did consider the cam position sensor may be reporting incorrectly. But I know not if more can be checked using VCDS. Keep in mind they just replaced the chain and tensioner and say both the belt and chain are mounted correctly. They did opt for an aftermarket chain and tensioner from ECS, rather than genuine VW/OE.

Their 091 data shows specified at 28°KW and actual at 28.5°KW.
But the Phase Position is at -10°KW when it should be near 0°KW. See pic below;
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If you have solid suggestions I could pass along...feel free to do so.
 
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