I should have mentioned that I did use the search function and I did find a million posts for that code, but I had two problems. First was just general information overload and it seemed like anything and everything was suggested as a fix. The second was that it seemed like all of the posts listed the code associated with a driveability problem, and not the lack of any other symptom.

Our car has had the crankcase vacuum lines replaced already in accordance with the Service Campaign.

Where is the mass flow sensor located under the hood? I could spray the connector (not the sensor) with some contact cleaner. How much should I expect to pay for a replacement sensor? Is it something that I can replace using standard hand tools?