Thank God for this thread. Thanks so much guys. Short story, I had a power steering leak and my car sat for 2 months. I just recently replaced the steering lines and pump, reconnected everything and it seemed fine. Then the check engine light came on. I didn't have access to a reader so I paid the $97.50 to take it to a shop. Found out it was this code and my MAF had a wrong size screw in it allowing unmetered air in. Code cleared and away I go.
That was Saturday. On my way to work this morning, the check engine light came on again. Not wanting to risk it something more severe, a 110+ mile round trip didn't look to appealling, I turned around and went home. Looked around and figured it must be the same code. Check my air filter and it had dried powersteering fluid on it. So I changed that, cleaned my MAF, and check my vacuum lines around the powersteering pump and found a line not fully connected. So tomorrow I'll try again. If it does comes up again, I'm pretty sure it's gonna be the O2 sensor, considering I have 101,xxx miles and the powersteering fluid leak was right over top of the sensor.