Erratic TCC Scheduling

WARNING: This page is about a different car, the 2004 Ford RV Cutaway, 2004 Ford Econoline, 2004 Ford E450 Super Duty, and 2004 Ford Cutaway. However, it is still accessible from the selected car via links, so may be relevant.

DIAGNOSTIC ROUTINE - ERRATIC TCC SCHEDULING

Possible Component	Reference/Action
253 - ROUTINE
Powertrain Control System
PCM, vehicle wiring harnesses, transmission internal wiring harness, TCC solenoid, OSS sensor, Transmission Range (TR position) sensor, APP sensor, BPP sensor, ECT sensor, 4x4 switch, tow haul switch TFT sensor,	Carry out on-board diagnostic tests. Refer to the appropriate INTRODUCTION article for diagnosis and testing of the PCM.
FMEM enabled causing the TCC to engage, disengage then engage. DTC P0741 present	Go To PINPOINT TEST A: CONTROL SOLENOIDS and Go To PINPOINT TEST B: TRANSMISSION FLUID TEMPERATURE (TFT) SENSOR .
	Repair as necessary. Clear DTCs, road test and rerun onboard diagnostic test.
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, stuck or bore damaged. Manual valve damaged, stuck or bore damaged	If damaged or parts are missing, install a new solenoid body assembly. If misassembled, reassemble correctly.
Torque Converter
Internal component failure	Remove transmission. Inspect for damage. Carry out torque converter checks, refer to TORQUE CONVERTER . If torque converter fails to pass checks or is damaged, install a new or remanufactured torque converter.