Faulty Brake Band Apply Solenoid
Brake Band Apply Solenoid harness is open or shorted
Brake Band Apply Solenoid circuit poor electrical connection
Engine Light ON (or Service Engine Soon Warning Light)
With the engine running, Transmission Control Module (TCM) High Side driver is closed, the Powertrain Control Module (PCM) detects that the Band Control solenoid was commanded off and the feedback voltage was less than 2.45v, or the Band Control solenoid was commanded off and the feedback voltage was from 2.45 -3.53v, or the Band Control solenoid was commanded on and the feedback voltage was more than 4.02v.