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Service bulletin SSM 50473

A bulletin is a manufacturer's communication to its dealers, as NHTSA indexes it. The summary is NHTSA's. The document is the manufacturer's: read it at NHTSA. A bulletin is not a recall, and listing a model year does not mean every vehicle of it is concerned.

The communication, as NHTSA indexes it (as of 2026-10-19)
TypeService bulletin
NHTSA id10207900
Published by NHTSA2022-02-16
Manufacturer's numberSSM 50473
Manufacturer's date2022-02-07
NHTSA componentELECTRICAL SYSTEM:SOFTWARE; UNKNOWN OR OTHER

NHTSA's summary

2021-2022 various Ford and Lincoln vehicles may exhibit an erroneous diagnostic trouble code (DTC) U1A01:93 stored in the telematics control unit (TCU). This may be due to various software parameters within the TCU. If this DTC is identified during normal diagnostics, but the vehicle does not exhibit any customer concerns around the TCU operation, clear this DTC and no further repairs are recommended. If the DTC returns after being cleared or if the vehicle exhibits connectivity concerns with the TCU, continue with normal Workshop Manual (WSM) diagnostics. If set erroneously, this DTC does not cause any observable concerns or warning messages and does not affect vehicle performance or durability. Ford is developing a software update which will be delivered to the vehicle via an over-the-air (OTA) TCU update in July 2022 to prevent this DTC from setting erroneously.

The document

The document is the manufacturer's. This site does not hold it. NHTSA files a document at one of these two addresses; we have not asked NHTSA which.

Components

Electrical system, Software

Trouble codes named

U1A01

Vehicles listed
FORD BRONCO2021
FORD EDGE2021, 2022
FORD F-1502021, 2022
FORD F-250 SD2022 (the catalog's model; the bulletin names a series or trim of it)
FORD F-350 SD2022 (the catalog's model; the bulletin names a series or trim of it)
FORD F-450 SD2022 (the catalog's model; the bulletin names a series or trim of it)
FORD F-550 SD2022 (the catalog's model; the bulletin names a series or trim of it)
FORD MUSTANG MACH E2021, 2022
FORD TRANSIT2022
LINCOLN MKX2007
LINCOLN NAUTILUS2021, 2022

Listing a model year does not mean every vehicle of it is concerned: the document says which.

Other bulletins for the same vehicles and component
SSM 523642024-04-04. Service bulletin. 2021-2023 Bronco vehicles built on or before 9-Jul-2023 may have new version software in their driver door module (DDM) and passenger door module (PDM) that contains noticeable enhancements to the window short drop operation. This software level can be identified in the DDM and PDM as Software Part Number MU5T-14C064-CR or later. This software was released via a software update delivered over-the-air (OTA) starting in September 2023 if the vehicle's connectivity was enabled in the vehicle settings. Vehicles with this new software will exhibit a short drop event to all door windows anytime the vehicle is unlocked using the remote keyless entry (RKE), accessory keyless entry keypad, or the interior door unlock switch. The short drop function will return to the UP position when a lock input is received from these same inputs. For vehicles equipped with passive entry, a short drop event will not activate when a door is unlocked by placing a hand on an exterior door handle. 2023-2024 Bronco vehicles built on and after 10-Jul-2023 received this software from the factory.
SSM 523452024-03-20. Service bulletin. Some 2022-2024 various Ford/Lincoln vehicles equipped with SYNC 4 may experience concern where customers are receiving an error message when trying to enroll in connected services. This may be due to the gateway module (GWM) software. To correct the concern, download and run the Transport and Factory Mode Deactivation app: under HS1 modules select BCM > Transport and Factory Mode > Download > Run. When the pop-up message appears for Change Vehicle Mode - Transport/Factory/Normal Mode, press OK. This will proceed to the Transport and Factory Mode Deactivation screen, select Unlock Vehicle Connectivity Settings (21 MY + Vehicles). A pop-up message appears noting Vehicle Is Now In Normal Mode, select OK. This will return to the Transport and Factory Mode Deactivation screen, select Exit. A final pop-up notification stating that the application is finished, select OK. For claiming, use causal part 14G490 and applicable labor operations in Section 10 of the Service Labor Time Standards (SLTS) Manual.
OTA 23PU1009SSNS2024-02-07. Service bulletin. Software Update PU1009-SS-NS for 2023 MY F-150 vehicles is now available. Quality Improvements include: -Eliminate incorrect Fuel System Lean PCM Fault DTC/MIL setting. - Robustness action in operation of vehicle to detect low-state-of-charge battery and prevent engine stall, as well as provide improved warning to customers when low-state-of-charge conditions exist. - Eliminate potential ABS Yaw Rate Calibration issue. - Robustness action to prevent potential line pressure drift DTC from setting. - Eliminate False Positive Throttle DTC or MIL from setting - Eliminate potential ABS Yaw Rate Calibration issue. - Robustness action to alleviate the Nuisance SSN (Stop Safely Now) message from setting and vehicle should operate as expected in the next Key Start event - Eliminates potential Emergency Parking Brake activation when wire harness experience a short.
TSB 23-24082024-01-05. Service bulletin. Some 2021 F-150 vehicles equipped with a 3.0L diesel engine and an 8 inch instrument panel cluster (IPC) display (minor feature code HKRAC, found by double-clicking the top left vehicle identification number (VIN) in OASIS) may exhibit an oil change minder feature that stays at 100% and does not decrease in the IPC. This may be due to the software level of the IPC. To correct this condition, follow the Service Procedure to update the APIM to the latest software level via a coordinated flash.
TSB 23-23892024-01-05. Service bulletin. Some 2021-2022 Mach-E vehicles may experience an exterior charge status indicator not illuminating the blue charging segments after an over the air (OTA) update. This may be due to the software in the SYNC module (APIM). To correct the condition, follow the Service Procedure steps to reprogram the APIM. NOTE: The APIM software update that addresses the symptom listed in this bulletin may have been sent via Ford Power-Up software updates delivered over- the-air (OTA) to connected vehicles that have automatic updates enabled through the center display screen. Enter the vehicle identification number (VIN) in Professional Technician System (PTS) and check the OTA Dashboard under the Connected Vehicle tab for OTA update history. If an update to the APIM has successfully completed recently and the customer is reporting the symptoms are no longer present, this article may not apply.
OTA SU6 P3MACHE2023-12-07. Service bulletin. Software Update SU6 P3 for 2021-2023 MACH E vehicles is now available. Quality Improvements include: - Enable electric return of hood latch release actuator - Corrects erroneous "frunk service required" warning post OTA. - Corrects alarm going off during an OTA download . - improved interior windsheld fogging and heater performance when driving in freezing temperatures - Improved Cold DC Fast Charging and heat sharing/smart heating. - Removal of cause of chime related DTC set against AHU. - Hands-Free to BlueCruise text update. - Adds 3 chimes for Over Speeding situation. - Adds chime for speed limit change. - Adds text box "Hold for Speed Warning OFF" - Introduces a more aggressive series of hood ajar warnings/chimes that trigger at lower speed than the current implementation - The customer is instructed to exit the vehicle when a battery hazard is detected. - IPC software addressing traction control toggle, BLIS and ISA presonaliztion, MyTrip distance reset, Low Tire pressure incorrect reading, and PWM buzz noise elimination. - Provides Yield and No Entry graphic display for Traffic Sign recognition. - Removes Tollbooth Mode - Adds a "some display features may be temporarily unavailable" message to the SYNC screen when a SYNC update is installing. - Profiles (Enhanced Memory) will not be stuck as Guest - Improved "Ask on Exit" pop- up functionality - Selectable Drive Modes - prevent default to normal mode due to loss of communication with SYNC - Improved charge status indication feedback while plugged in.
OTAPU1009TLCCSM22023-12-07. Service bulletin. Software Update PU1009-TLC-CSM2 for 2021 F-150 vehicles is now available. Quality Improvements include: -improvement to trailer license plate lights illumination. -improvement to interior motion sensor alarm to prevent inadvertent alarms -enhancement to prevent alarm activation during inhibit OTA updates
OTAPU0813DORF1502023-12-07. Service bulletin. Software Update PU0813-DOR-UP2 for 2021 F-150 vehicles is now available. Quality Improvements include: -Improved 1-touch up window performance -Mirror unfold button performance improvement -Heated mirror overtemp fix Reference 21B16. -Prevent vehicles experiencing loss of driver frontal switch pack control (window, mirror, rear window lockout, mirror-fold if equipped)) at low voltage.
OTAPU0813DORUP22023-12-07. Service bulletin. Software Update PU0813-DOR-UP2 for 2022-2023 F-150 BEV Lightning vehicles is now available. Quality Improvements include: -Prevent vehicles experiencing loss of driver frontal switch pack control (window, mirror, rear window lockout, mirror-fold if equipped)) at low voltage.
OTAPU1103NATF1502023-12-07. Service bulletin. Software Update PU1103-NAT-VCE for 2022-2023 F-150 Lightning vehicles is now available. Quality improvements include: - Addresses charge status blue segments illuminated indicator issue - Adds a "some display features may be temporarily unavailable" message to the SYNC screen when a SYNC update is installing. - Selectable Drive Modes - prevent default to normal mode due to loss of communication with SYNC - Improved instant voice feedback share feature - Improved Ask on Exit pop- up functionality. - Improved charge status indication feedback while plugged in.