Torque Converter Clutch (TCC) Always Apply/Stalls Vehicle

WARNING: This page is about a different car, the 2010 Ford Pickup, 2010 Ford F550 Super Duty, 2010 Ford F450 Super Duty, and 2010 Ford Cab & Chassis. However, it is still accessible from the selected car via links, so may be relevant.

DIAGNOSTIC ROUTINES - TORQUE CONVERTER CLUTCH

Possible Component	Reference/Action
251 - ROUTINE
Powertrain Control System
PCM (gasoline engines), Transmission Control Module (TCM) (diesel engines), Torque Converter Clutch (TCC) Solenoid	Carry out On-Board Diagnostic (OBD) tests. Refer to the INTRODUCTION - GASOLINE MODELS for diagnosis and testing of the PCM. For gasoline engines, GO to PINPOINT TEST A . For diesel engines, GO to PINPOINT TEST F . Repair as necessary. Clear the DTCs, road test and rerun OBD test.
Incorrect Line Pressures
High TCC pressure	Check pressure at line tap. Carry out Line Pressure Test. Refer to SPECIAL TESTING PROCEDURES . Follow the pressure diagnosis test as required.
Solenoid Body Assembly
Bolts not tightened to specification	Tighten to specification.
Filter gasket damaged	Inspect for damage. If damaged, install a new filter gasket.
Contamination	Disassemble and clean.
TCC solenoid damaged, misassembled, missing, stuck or bore damaged. Manual valve damaged, misassembled, missing, stuck or bore damaged	If damaged or parts are missing, install a new solenoid body assembly. If misassembled, reassemble correctly.
Fluid Pump Assembly
Bolts not tightened to specification	Tighten to specification.
Gasket damaged	Inspect for damage. If damaged, install a new gasket.
Porosity, cross leaks, cup plug missing, plugged hole	Inspect for damage. If damaged, repair as necessary.
Pump gears and/or gear pocket damaged	Inspect for damage. Install a new pump.
Control valves, converter charge limit valve, converter pressure regulator valve springs or seals damaged, stuck or not assembled correctly	Inspect for damage. Install a new seal or pump assembly.
Torque Converter
Internal failure preventing TCC from applying	Remove the transmission. Inspect for damage. Refer to TORQUE CONVERTER CONTAMINATION INSPECTION . If the torque converter fails to pass the criteria for replacement or is damaged, install a new or remanufactured torque converter.