Fault codes P0101 and P1770 keep returning

After being garaged for a year, my 99 e46 323i is throwing codes P0101 (MAF) and P1770 (CAM shaft pos sensor) and is preventing me from Smog. After doing research and watching a lot of DIY's on the subject i performed the following

Cleaned then replaced MAF (used appropriate CCR MAF cleaner)
Removed and inspected intake hoses up to TB for leaks
Removed and cleaned ICV (was dirty and locked up)
Cleaned TB (did not remove)
Removed K&N air filter and replaced with new stock one

After each step, I cleared codes with my OBD II but they would still come back immediately (although sometimes P1770 would be in the "Pending" section) I've read that P1770 can be caused by P0101. Scan tool also says there are '0" volts going to MAF. I'm thinking i should suspect the wiring harness connected to MAF (from DME, I believe?) Can someone explain the best way to check this with a multi-meter? Also, how should i check the condition of the CAM sensor just in case? Might it be necessary to reprogram the DME? Might it also be necessary to reset the monitors? Can these be done DIY? Should i suspect a bad comp? Any advice is much appreciated!!!