Based on the error code I received from the CEL and the symptoms.
When shifting to 2nd from 1st I feel the torque convertor is locking up all the way. The rest of the gears are fine. It doesnt slip at all. It doesnt feel like its a tranny related problem where the tranny has to get replaced. I took it to pep boyz and r&s strauss ( local car places ) and they got the same error codes and advised me that I should get that solenoid replaced.

I'd rather spend 150 bucks and pray this solves my issue vs. replacing the tranny.

I hope this helps.
Are you having an problem also?