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Service bulletins for the 2021 Ford F-350

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.

240 on file from NHTSA, as of 2026-10-19.

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Bulletins, newest first
24B27 S22024-08-07. Service bulletin. UNKNOWN OR OTHER. Certain 2020-2024 Super Duty and 2021-2025 Model Year Econoline Equipped With a 6.8L or 7.3L Gasoline Engine Powertrain Control Module (PCM) Software Update REASON FOR THIS SUPPLEMENT • Software Availability Update: Software is now available to repair 2021-2022 and 2025 Model Year Econoline vehicles. The service action has been updated accordingly. • Technical Information: IDS programing information has been added for 2021-2023 Model Year Econoline Vehicles.
SSM 527652024-08-06. Service bulletin. FUEL/PROPULSION SYSTEM. Some 2020-2022 F-Super Duty pickup vehicles equipped with a 6.7L engine, 175 inch wheelbase, and built on or before 23-Sep-2021 may exhibit a thump/whine/knock noise from the midship fuel tank at idle or during key on, engine off (KOEO) after performing TSB 21-2057. The noise may be more pronounced at fuel levels at or below 1/4 tank. This may be due to the fuel pump
SSM 527222024-08-06. Service bulletin. UNKNOWN OR OTHER. Some 2019-2024 Ford and Lincoln vehicles equipped with SYNC3 may experience various FordPass/LincolnWay connectivity concerns including but not limited to: missing activation prompt (pop-up) on the vehicle's center display screen when attempting to activate vehicle through FordPass/LincolnWay, incorrect location/global positioning system (GPS) reported through FordPass/LincolnWay, problems with remote commands being performed through FordPass/LincolnWay, incorrect data/information reported on FordPass/LincolnWay. These symptoms will be accompanied by diagnostic trouble code (DTC) B156D:89 in the TCU. This may be due the accessory protocol interface module (APIM) software
SSM 527042024-08-05. Service bulletin. UNKNOWN OR OTHER. Some 2019-2024 vehicles equipped with SYNC 3 may experience a programming Error - "INSTL_ERR12" while programming APIM using the Ford Diagnosis and Repair System (FDRS) or experience a frozen screen which says "updating system software" or no progress/response from module using the universal USB updater. This may be due to low memory in the APIM commonly occurring on software level NU5T-14G381-AB/BB. The current software level can be verified in the SYNC tab of Professional Technician System (PTS) or using the vehicle's center display screen, Settings > General > About. To correct the condition, run the universal USB updater. If unsuccessful, using the latest software version of the FDRS scan tool, run the service function "APIM - Reset the Accessory Protocol Interface Module Application" and select "Clear All User Data" option. The center display screen will reboot. As soon as the vehicle's center display screen displays the boot up logo, immediately reinsert the same universal serial bus (USB) drive that was utilized during the prior failed programming attempt.
SSM 526752024-07-03. Service bulletin. UNKNOWN OR OTHER. Some 2019-2024 vehicles equipped with SYNC 3 may experience a programming Error - "INSTL_ERR12" while programming APIM using the Ford Diagnosis and Repair System, or experience a frozen screen which says "updating system software" or no progress/response from module using the universal USB updater. This may be due to low memory in the APIM commonly occurring on software level
24B27 S12024-07-02. Service bulletin. ENGINE. Certain 2020-2024 Super Duty and 2021-2025 Model Year Econoline Equipped With a 6.8L or 7.3L Gasoline Engine Powertrain Control Module (PCM) Software Update In affected vehicles, the Variable Displacement Oil Pump (VDOP) delivers oil to the engine at low pressure/capacity during idle conditions. Routine occurrences of prolonged idle time may result in excess wear to the engine camshaft lobes and valve tappet surfaces due to reduced lubrication. Over time, the engine may progressively run rough due to cylinder misfire. Additionally, customers may hear engine tapping noises and the Check Engine Light (CEL) may illuminate
TSB 24-21822024-06-13. Service bulletin. UNKNOWN OR OTHER. This article supersedes TSB 23-2307 to update the Service Procedure and vehicle model years affected. Some 2019-2020 Edge/F-150/Fusion/Continental/MKZ/Nautilus, 2019-2021 Transit Connect, 2019-2023 Mustang, 2019-2023 Ranger, 2020-2021 Expedition/Navigator, 2020-2022 Escape/Corsair/Super Duty/EcoSport, 2020-2024 Explorer/Aviator/Transit, 2021-2024 Bronco Sport, 2022-2024 Maverick vehicles with SYNC 3 may experience various SYNC performance related concerns. This may be due to the SYNC Software. To correct the condition, follow the Service Procedure to update theaccesory protocol interface module (APIM) software.
SSM 525952024-06-10. Service bulletin. POWER TRAIN. When replacing the E clutch hub (7P211) on 2020-2024 F-Super Duty and 2024-2025 F-650/F-750 vehicles equipped with a 10R140 transmission, a new washer (7482) has been added and must be installed with the new updated E clutch hub. Refer to the Workshop Manual (WSM), Section 307-01B for proper installation of the washer. Refer to the parts catalog for the appropriate part numbers for the E clutch hub and the washer.
TSB 24-21362024-06-03. Service bulletin. UNKNOWN OR OTHER. Some 2020-2022 F-Super Duty vehicles built on or before 31-Oct-2022 and equipped with a 6.7L engine may exhibit an illuminated malfunction indicator lamp (MIL) with diagnostic trouble codes (DTCs) P2201, P2209, P220E and/or P24FE stored in the powertrain control module (PCM). This may be due to the software in the PCM and the nitrogen oxides (NOx) sensor 11. To correct the condition, follow the Service Procedure to replace the NOx sensor 11 and reprogram the PCM and transmission control module (TCM).
SSM 525482024-05-23. Service bulletin. POWER TRAIN. Various vehicles equiped with 10R80/10R80 MHT/10R100/10R140 transmissions may require replacement of the seal kits (7153) when internal repairs are being performed. These kits come with 4 wheel drive (4WD) seals and will no longer include the 2WD seals. When working on a 2WD vehicle, any 2WD seals must be ordered separately. Refer to the parts catalog for the proper 2WD seals required.
SSM 524762024-05-03. Service bulletin. EQUIPMENT. All accessory stick-on keyless entry keypads come with a wallet card containing the master code. If the accessory keypad was factory installed, this card will be placed in the glove box and should be handed to the vehicles owner during initial delivery. Unlike the integrated (wired) factory keypad, the accessory keypad master code cannot be retrieved from the vehicle using a diagnostic scan tool. If the wallet card for an accessory keypad is lost, follow these steps to recover the code. Dealer Key Code access is granted through the Dealer Program Enrollment System (DPES); dealership management can authorize users. The authorized user must go to FMCDealer.com > Parts and Service > Parts Product Line Information > Keys/Entry Devices > Aftermarket Keyless Entry Keypad Code Access. Follow the instructions on the screen to obtain the master code for the accessory keypad.
SSM 524102024-04-24. Service bulletin. UNKNOWN OR OTHER. Various vehicles have had pinpoint tests, guided routines and the Warranty and Policy Manual recentlyupdated for diagnostics and repairs on SYNC generation 3 and later applications. When performingdiagnostics and repairs on SYNC Gen 3 or later, select the diagnostics tab and search for related symptoms,DTCs and keywords. The search results will be shown in the search results pane. Read and follow allTechnical Service Bulletins (TSB), Special Service Message (SSM)s or General Service Bulletin (GSB) first if abulletin specifically addresses the vehicle concern. If there are no messages, run the appropriate diagnosticpinpoint test found in the Workshop Manual (WSM). Follow the steps in the pinpoint test. Make sure to note thetitle of the guided routine, using the correct one for the vehicle's symptom or diagnostic trouble code (DTC) iscritical. Depending on the outcome of the pinpoint test, a repair validation code (RVC) may be generated eitherin the pinpoint test or Guided Routine. If the vehicle concern still exists after following the pinpoint tests orguided routine, then a manual RVC can be generated using the RVC Assist Form. A manual RVC can only begenerated once the above process has been followed.
SSM 523352024-03-20. Service bulletin. ENGINE AND ENGINE COOLING. For 2015-2024 Ford and Lincoln vehicles equipped with turbocharged engines and customer concern of an engine oil leak, refer to Workshop Manual (WSM), Section 303-00 for oil leak inspection and testing methods. Ford has evaluated turbochargers replaced for oil leak symptoms and although oil may collect on the external surface of a turbocharger, it is extremely rare for a turbocharger assembly to be the root cause of the oil leak. Careful inspection of the turbocharger oil feed and drain tubes should be performed along with the recommended WSM procedures as needed. Warranty claims for turbocharger replacement going forward will be assessed.
SSM 523142024-03-20. Service bulletin. POWER TRAIN. During service and repair requiring removal and replacement of a crankshaft bolt and/or crankshaft damper, achieving proper torque of the crankshaft pulley bolt is critical. Incorrect torque may allow the bolt to loosen resulting in the timing gear breaking and engine damage. Replacement of the bolt is critical to the repair and accurately following the installation procedure in the Workshop Manual (WSM) Section, 303-01 is extremely important. The bolt torque procedure can be found in the crankshaft front seal removal and installation procedure or in the engine assembly procedure.
SSM 523072024-03-05. Service bulletin. ELECTRICAL SYSTEM. Some 2020-2023 Ford and Lincoln SYNC3 equipped vehicles may experience an inaccurate notification in the FordPass®/LincolnWay® app indicating Vehicle Has Entered Deep Sleep Mode. Vehicle Has Entered Deep Sleep Mode message is expected if the vehicle has not been started for 14 consecutive days, battery voltage is at/below 9.5 volts or the body control module (BCM) 12 volt battery state of charge (SoC) drops below 50%. If the vehicle is going into deep sleep due to one of these conditions, follow normal Workshop Manual (WSM) Section 414-01 procedure to correct the concern. If the vehicle is going into deep sleep outside these conditions, this may be due to the telematics control unit (TCU) software. To correct this condition, follow the Service Procedure to update the TCU to the latest software. For claiming, use causal part 14G229 and applicable labor operations in Section 10 of the Service Labor Time Standards (SLTS) Manual.
SSM 521882024-01-24. Service bulletin. STEERING. 2024 F-Super Duty vehicles are equipped with XL-22 (WSS-M2C184-A1) high temperature power steering fluid that looks like clear hydraulic fluid. This fluid is an improvement in high temperature and thermal oxidative stability compared to Mercon LV. This power steering fluid is also compatible and highly recommended to use when filling or topping off power steering systems of all 2012-2023 F-Super Duty vehicles originally equipped with Mercon LV.
SSM 520982023-12-01. Service bulletin. ENGINE AND ENGINE COOLING. Some 2020-2022 F-Super Duty vehicles equipped with a 6.7L engine may require a long block replacement of the engine for various reasons. The replacement long block may be equipped with an updated upper oil pan. If the oil filter adapter from the original engine does not mate with the new upper oil pan, service parts PC3Z-6881-A (oil filter adapter), W503277-S439 (package of 6 bolts, 4 bolts required), W718564-S450 (stud), W520101-S442 (nut), and PC3Z-14A206-A (starter cable retaining bracket) will be needed to complete the repair.
SSM 519592023-11-03. Service bulletin. POWER TRAIN. When replacing the transmission case on a 2020-2022 F-Super Duty equipped with a 10R140 transmission, the new service case may not come equipped with the transmission fluid leveling plug. To achieve proper transmission fluid level, a new transmission fluid pan and gasket must be installed (service part PC3Z-7A194-A). Refer to the 2023 F-Super Duty Workshop Manual, Section 307-01B to properly set the transmission fluid level when using the newer transmission fluid pan.
TSB 23-23072023-11-02. Service bulletin. UNKNOWN OR OTHER; EQUIPMENT:ELECTRICAL:NAVIGATIONAL SYSTEM(GLOBAL POSITIONING SYSTEM); ELECTRICAL SYSTEM:SOFTWARE; EQUIPMENT:ELECTRICAL:INFOTAINMENT:SOFTWARE. Some 2019-2020 Edge/F-150/Fusion/Continental/MKZ/Nautilus, 2019-2021 Mustang/Ranger/Transit Connect, 2020-2021 EcoSport/Escape/Expedition/Explorer/F-Super Duty/Aviator/Corsair/Navigator, 2021 Bronco Sport and 2020-2022 Explorer/Aviator vehicles with SYNC 3 may experience various SYNC performance related concerns. This may be due to the SYNC Software. To correct the condition, follow the Service Procedure to update the SYNC module (APIM) software.
SSM 519372023-10-05. Service bulletin. EQUIPMENT. Some vehicles equipped with power folding mirrors may exhibit power folding mirrors that are inoperative or exhibit a clicking sound. This may be due to the mirrors being manually folded in, during transportation, going through a car wash, bumped in a parking lot, or found during pre-delivery inspection (PDI). Prior to the replacement of any components, attempt to synchronize the mirrors by following the Power Mirrors Synchronization procedure. Refer to Workshop Manual (WSM) Section 501-09 Rear View Mirrors - General Procedures - Power Mirrors Synchronization.
22L032023-09-06. Service bulletin. ENGINE AND ENGINE COOLING. Certain 2021-2022 Model Year Econoline, Super Duty Chassis Cab, F53 Motor Home, F59 Step Van, and F650/F750 Medium Duty Chassis Cab Vehicles Equipped with a Premium Rated 7.3L Engine - Engine Horsepower Credit
SSM 518382023-09-04. Service bulletin. ELECTRICAL SYSTEM. In various 2017-2023 Ford and Lincoln vehicles, customers may receive a message in the FordPass or LincolnWay App stating Feature Unavailable. Since this is a fleet vehicle, it cannot access the (SYNC Connect) FordPass or LincolnWay app through the TCU Embedded Modem. If this message appears, the vehicle may be equipped with a fleet telematics module. Replacement of the TCU or TCU related repairs will not prevent this message from appearing. Refer the customer to in app FordPass Guides or LincolnWay Concierge Teams to aid with fleet telematics removal. Open app, select Account > Help > CHAT or CALL option.
SAN-Vol1 I12023-08-16. Service bulletin. EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL. The Service Awareness Newsletter is an informal communication that contains information that may not be presently available in a TSB, SSM, GSB, or other electronic communication. This article includes information on warranty, technical service tips and other service information.
SSM 518292023-08-14. Service bulletin. EQUIPMENT; VISIBILITY:REARVIEW MIRRORS/DEVICES. Some F-Super Duty and F-150 vehicles equipped with trailer tow mirror may exhibit various exterior rear view mirror functional concerns that require replacement after diagnosis. To properly determine if the defect is warrantable, cleaning and close inspection of the affected mirror may be required. To aid in proper warranty determination, the Rear-View Mirror Analysis general service bulletin (GSB) has been updated with a detailed cleaning procedure that should be followed prior to any inspection. New labor operations (17682ZZ or 17682ZZT) have been created that covers the cleaning and inspection process and may be used even if condition of failure is non-warrantable. Ford has inspected numerous returned parts and determined many cases are caused by damage which is unwarrantable and may be subject to chargeback. Refer to the latest version of the GSB on OASIS.
SSM 517252023-06-21. Service bulletin. ELECTRICAL SYSTEM. Some 2020-2023 Ford and Lincoln SYNC3 equipped vehicles may experience an inaccurate notification in the FordPass®/LincolnWay® app indicating Vehicle Has Entered Deep Sleep Mode. Vehicle Has Entered Deep Sleep Mode message is expected if the vehicle has not been started for 14 consecutive days, battery voltage is at/below 9.5 volts or the body control module (BCM) 12 volt battery state of charge (SoC) drops below 50%. If the vehicle is going into deep sleep outside these conditions, this may be due to the telematics control unit (TCU) software. To correct this condition, follow the Service Procedure to update the TCU to the latest software. For claiming, use causal part 14G229 and applicable labor operations in Section 10 of the Service Labor Time Standards (SLTS) Manual.

The summaries are NHTSA's. Each bulletin's page links NHTSA's copy of the manufacturer's document.