I assume this is related to your 99?
You actually have FOUR O2 sensors, so that may still be an issue. Also, on the V engine configuration a fuel trim code on only one bank is almost never the MAF, more likely an O2 sensor, cat, vacuum leak, etc. on the bank that is triggering the code
All that said, if the car is running fine you can always still have a pending (transient) code and the key is to mostly ignore them unless they trigger a cel.
The only time pending codes are really (potentially) meaningful is when you have a symptom or two you're trying to chase down. Otherwise their usefulness is mostly limited to increasing one's post count on internet forums.
Take care and enjoy the ride,
Greg
