Faulty Line Pressure Solenoid
Line Pressure Solenoid harness is open or shorted
Line Pressure Solenoid circuit poor electrical connection
Engine Light ON (or Service Engine Soon Warning Light)
The Diagnostic Trouble Code (DTC) will set when with the engine running in gear at cruise speed and the Powertrain Control Module (PCM) detects that the Torque Converter Clutch (TCC) circuit was shorted to ground.