Passat (B6) :: Error Code P0016 After Oil Change

P0016 - Crankshaft Position | Camshaft Position Correlation
Bank 1 Sensor A
2006 Passat - 3.6L V6

Here is my issue: I was lazy and waited a bit too long to get my oil changed. I finally did 3 days ago. I have been very busy so I decided to take it to a local mechanic to let them take care of it. They flushed the oil, ran other oil through it with a new oil filter, flushed that, then put in new synthetic oil with another new oil filter. They also replaced the air filter.

Everything was fine for 2 days.

Then, while I was driving in stop and go traffic, the "EPC" and "Engine Malfunction" lights came on. There was also a loss of power and the car seems to wait too long to shift gears.

So, I took it back to the mechanic who had it a few days prior. He pulled the code from it (posted at the top), and cleared the code from the car. That mechanic told me that I need a "cam position indicator sensor". He also claimed that what he did had nothing to do with this issue. I decided to check with the dealer. He cleared the code and I left. After clearing the code, the car drove fine for most of that day, then it returned.

I spoke with the VW dealership's shop manager and he said that he does not believe that is the issue at all and asked me to bring it in. He also mentioned a clogged oil line as being the potential culprit.