Some 2017-2018 F-150/Raptor, 2018 Expedition/Mustang/Navigator vehicles equipped with a 10R80 automatic transmission and built on or before 20-Nov-2017 may exhibit an illuminated malfunction indicator lamp (MIL) with diagnostic trouble codes (DTCs) P0741 and P1744 in the powertrain control module (PCM) or transmission control module (TCM).
This may be due to a sticking torque converter clutch (TCC) valve in the main control valve body assembly.
Follow the Service Procedure steps below to correct the condition.
1. Check the vehicle build date. Was the vehicle built on or before 20-Nov-2017?
(1). Yes - proceed to Step 2.
(2). No - this article does not apply.
2. Using the appropriate Ford scan tool or equivalent, retrieve DTCs. Are P0741 and P1744 the only DTCs stored in the PCM or TCM?
(1). Yes - proceed to Step 3.
(2). No - this article does not apply. Refer to the PC/ED Manual for normal diagnostics.
3. Replace the main control valve body assembly.