p0011, noise, engine falling apart?

[fmugur]

I always thought this wasn't going to happen to me and I used to skip the threads about noise and chain/tensioner replacement.

Yesterday morning, I got a weird noise coming from the engine but not very loud.
So I parked the car back in the garage and used the other car. Last night I started the engine and the noise wasn't there anymore... for a few minutes. Then all of a sudden the noise increased to a level where I thought the engine will fall apart or explode. Tracing the noise it seems like it's coming from the left side of the engine. I used carsoft and another code reader and I get p0011 and p0491. I suspect the tensioner is the culprit and chain makes the noise. This morning the noise was there right from the start.

It looks like what I was afraid of did happen. I am not a mechanic so I am not sure I can fix it this time. Can you please tell me how to diagnose this problem. How much an indy shop would change for this?