99 Carrera 4 start up rattle

I just picked up a Carrera 4 recently and when I looked at it there was no rattle and everything ran great a couple weeks later I had a little rattle so I checked the cam deviation for bank 1 and 2. Bank 1 -9.3 bank 2 .13. I know bank one is out but from everything I have read it should set a check engine light at or above 7 and I have zero check engine light. Also some back story on the car. I have receipts from 2017 for ims,clutch,rear main, bank 1 cam tensioner and pads and re timed. That was at 97k miles now it has 108k miles 9 years later and I wouldn�t think the deviation would be bad so quick. Could there be something else causing the numbers or bad signal. I�m still pretty new to the Porsche world . Looking for any input thanks

Someone posted a question to startup rattle in the past 2 weeks or so. Ims chain tensioner was mentioned as cause, I seem to remember. It received a spring when the switch to hyvo chain to drive IMS was made so Porsche obviously was aware that oil leaks out the tensioner over time parked up and the rattle at startup concerned owners enough to add the spring. Pads don't wear that quickly. More likely the bank 1 chain tensioner did not exert the same force onto the chain when the cam timing was set as it subsequently does during operation of engine. That can happen when the special tool to tighten the chain is not available and instead the cam chain tensioner is used. You then basically start with a slight cam deviation even though the ramps are new. You can exclude bad signal. It either reads or it doesn't.