Erratic TCC Scheduling

WARNING: This page is about a different car, the 2005 Ford Pickup, 2005 Ford F550 Super Duty, 2005 Ford F450 Super Duty, and 2005 Ford Cab & Chassis. However, it is still accessible from the selected car via links, so may be relevant.

DIAGNOSTIC ROUTINES - 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-P) sensor, APP sensor, BPP sensor, ECT sensor, PTO input, 4x4 switch, tow haul switch TFT sensor,	Carry out on-board diagnostic tests. See INTRODUCTION - GASOLINE article or INTRODUCTION -- 6.0L DIESEL article for diagnosis and testing of the PCM.
	GO to PINPOINT TEST A , and GO to PINPOINT TEST B .
FMEM enabled causing the TCC to engage, disengage then engage. DTC P0741 present	Repair as necessary. Clear DTCs, road test and rerun on-board 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 the transmission. Inspect for damage. Refer to TORQUE CONVERTER in the General Procedures portion of this article. If the torque converter fails to pass the criteria for replacement or is damaged, install a new or remanufactured torque converter.