Re: 2007 ford fusion
Shift Solenoid C and B
1.Sensor or solenoid faulty
2.Connector terminal contact is damaged or corroded
3.Wire harness - Check harness for correct voltage, open, short to ground or short to voltage
4.Update control unit software - Check for the latest control unit update
5.Powertrain or Engine Control Module faulty
Check the connections to the trans to make sure they're clean. Otherwise, it'll need a trans shop check.