WenmarOpen by Wenmar Pro

Service bulletins for the 2020 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.

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

By type

By component

By trouble code

By topic

Only bulletins with component: Transmission and driveline are shown. Show all

Bulletins, newest first
TSB 21-20492021-05-04. Service bulletin. POWER TRAIN. Some 2020 F-Super Duty vehicles equipped with a 10R140 automatic transmission may exhibit a harsh engagement/harsh shift/delayed shift with or without an illuminated malfunction indicator lamp (MIL) or diagnostic trouble codes (DTCs) P0729, P0731, P0732, P0733, P0734, P0735, P0736, P076F, P07D9, P07F7, P0751, P0756, P0761, P0766, P0771, P2707, P2700, P2701, P2702, P2703, P2704 and/or P2705 stored in the powertrain control module (PCM) or transmission control module (TCM). This may be due to sticking valves in the main control valve body. Most vehicles will improve and no longer exhibit the condition after the first 8,000 km (5,000 mi) of driving. To correct the condition, follow the Service Procedure steps to perform the transmission accelerated main control break-in routine for the appropriate clutches and/or overhaul main control valve body.
TSB 21-20562021-04-03. Service bulletin. POWER TRAIN. Some 2020-2021 F-Super Duty vehicles equipped with a 6.7L engine and built on or before 10-Feb-2021 may exhibit an illuminated powertrain malfunction indicator (wrench) lamp with only diagnostic trouble code (DTC) P07F6 stored in the transmission control module (TCM). The vehicle may also exhibit harsh engagements, poor shift quality and/or loss of 9th gear as a result of the DTC being set. This may be due to the software in the TCM. To correct the condition, follow the Service Procedure to reprogram the TCM.
TSB 21-20552021-04-03. Service bulletin. POWER TRAIN. This article supersedes TSB 20-2336 to update the Title, Issue, Action, vehicles affected and production fix date. Some 2020-2021 F-Super Duty vehicles equipped with a 6.7L engine built on or before 10-Feb-2021 may exhibit an illuminated malfunction indicator lamp (MIL) with diagnostic trouble codes (DTCs) P0300-P0308, P054F, P0603, P203B, P208B, P208C, P20EE, P2201, P24C2, P27B4, and/or P27B5 stored in the powertrain control module (PCM). The vehicle may also exhibit a forced idle condition. This may be due to various strategies within the PCM software. To correct the condition, follow the Service Procedure to reprogram the PCM.
21B032021-04-03. Service bulletin. POWER TRAIN. Certain 2020 Model Year Super Duty F250-F600 Vehicles Equipped with a 10R140 Transmission - Number One Planetary and Ring Gear Assembly In all of the affected vehicles, a distressed No. 1 planetary needle bearing inside the ring gear assembly will generate contamination that may produce rough shifts. A wrench light is likely to come on, and the transmission may go into safe mode and only operate in seventh gear. As damage progresses, the transmission may only be capable of limited vehicle speed or may not engage in forward or reverse
21B03-S12021-04-03. Service bulletin. POWER TRAIN. Certain 2020 Model Year Super Duty F250-F600 Vehicles Equipped with a 10R140 Transmission - Number One Planetary and Ring Gear Assembly- Ref Cust Sat Program 21B03 dated March 3, 2021 In all of the affected vehicles, a distressed No. 1 planetary needle bearing inside the ring gear assembly will generate contamination that may produce rough shifts. A wrench light is likely to come on, and the transmission may go into safe mode and only operate in seventh gear. As damage progresses, the transmission may only be capable of limited vehicle speed or may not engage in forward or reverse
SSM 494832021-02-04. Service bulletin. POWER TRAIN. Some 2017-2021 F-Super Duty and 2016-2021 F650-750 with 6.7L diesel engines, 2015-2019 Transit with 3.2L diesel engines and 2018-2021 F-150 with 3.0L diesel engines may exhibit an illuminated malfunction indicator lamp (MIL) with diagnostic trouble code (DTC) P206C in the powertrain control module (PCM). Review of repair data supports that P206C is often the result of incorrect diesel exhaust fluid (DEF) concentration. Per Powertrain Control/Emissions Diagnosis (PC/ED) Pinpoint Test (PPT) RJ, a DEF concentration reading below 28% will set P206C and cause vehicle derate. If low concentration is suspected, drain fluid and replace with known good DEF before replacing any parts. Low concentration of DEF is not a warrantable condition.
SSM 494412021-02-04. Service bulletin. POWER TRAIN. Some 2020-2021 Super Duty vehicles equipped with an 10R140 automatic transmission may exhibit an illuminated malfunction indicator lamp (MIL) and/or powertrain malfunction (wrench) indicator lamp with diagnostic trouble codes (DTCs) P0715, P0716, P0717, P0718, P07BF and/or P07C0 stored in the powertrain control module (PCM). If any of these DTCs are set, focus diagnostics on the turbine shaft speed sensor (TSS) and/or TSS circuits. Refer to Workshop Manual (WSM), Section 307-01. Replacement of the ISSA or ISSB sensor will not correct this condition.
SSM 494392021-02-04. Service bulletin. POWER TRAIN; EQUIPMENT; EQUIPMENT ADAPTIVE/MOBILITY. Some 2020-2021 F-Super Duty vehicles with 6.7L and 10R140 powertrain may exhibit an illuminated powertrain malfunction indicator (wrench) lamp with only DTC P07F6 stored in the transmission control module (TCM). The vehicle may also exhibit harsh engagements, poor shift quality and/or loss of 9th gear as a result of the DTC being set. If no additional DTCs or symptoms are present, clear keep alive memory and transmission adaptive tables with the appropriate Ford diagnostic scan tool, and perform an adaptive learning drive cycle. Transmission replacement is not necessary. Inform customers that a further improved calibration will be available in early March 2021. Let the customer know they can continue to drive the vehicle after performing this SSM, and schedule a service appointment for early March 2021. Monitor OASIS for updates.
TSB 20-23752021-01-05. Service bulletin. EQUIPMENT; POWER TRAIN. Some 2020 F-Super Duty vehicles equipped with a 10R140 automatic transmission may exhibit a harsh engagement/harsh shift/delayed shift with or without an illuminated malfunction indicator lamp (MIL) or diagnostic trouble codes (DTCs) P0729, P0731, P0732, P0733, P0734, P0735, P0736, P076F, P07D9, P07F6, P07F7, P0751, P0756, P0761, P0766, P0771, P2707, P2700, P2701, P2702, P2703, P2704 and/or P2705 stored in the powertrain control module (PCM) or transmission control module (TCM). This may be due to sticking valves in the main control valve body. Most vehicles will improve and no longer exhibit the condition after the first 8,000 km (5,000 mi) of driving. To correct the condition, follow the Service Procedure steps to perform the transmission accelerated main control break in routine for the appropriate clutch(es) and/or replace the main control valve body.
SSM 494162021-01-04. Service bulletin. ELECTRICAL SYSTEM; ENGINE AND ENGINE COOLING; POWER TRAIN. Some 2020-2021 F-Super Duty vehicles equipped with a 6.2L or 7.3L gas engine may exhibit an illuminated malfunction indicator lamp (MIL) with diagnostic trouble code (DTC) P0339 stored in the powertrain control module (PCM) or the vehicle may exhibit a runs rough concern with no DTCs. This may be due to a concern with contamination on the crankshaft position (CKP) sensor. If pinpoint test JD in the Powertrain Control/Emissions Diagnosis (PC/ED) Manual leads to CKP sensor replacement, inspect the sensor for contamination and document the results in the warranty claim. Use causal part 6C315 and utilize labor operation 12650D57D in the Service Labor Time Standards (SLTS) Manual.
TSB 20-24082020-12-05. Service bulletin. EQUIPMENT; POWER TRAIN. Some 2020 F-Super Duty vehicles equipped with a 10R140 transmission built on or before 7-Nov-2020 may exhibit a ticking or scraping noise coming from the bellhousing. The noise may or may not go away while in PARK and/or NEUTRAL. This may be due to the torque converter studs contacting the flexplate inspection cover and/or internal torque converter damper spring contact. To correct the condition, inspect and adjust the flexplate inspection cover (gas engine only) and/or replace the torque converter (gas or diesel engine).
TSB 20-23932020-12-05. Service bulletin. POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE (TCM/PCM/TECM); EQUIPMENT. Some 2020 F-Super Duty vehicles equipped with a 10R140 automatic transmission and built on or before 21-Sep-2020 may exhibit a lack of power with an illuminated malfunction indicator lamp (MIL) and/or wrench lamp with diagnostic trouble codes (DTCs) P0715, P0716, P0717 and or P07C0 stored in the powertrain control module (PCM) or transmission control module (TCM). This may be due to the turbine shaft speed (TSS) sensor. To correct the condition, follow the Service Procedure to replace the TSS sensor.
TSB 20-23802020-11-05. Service bulletin. POWER TRAIN; ENGINE AND ENGINE COOLING:EXHAUST SYSTEM. Some 2020 F-Super Duty vehicles equipped with the 6.2L or 7.3L engine built on or before 05-Jun-2020 may exhibit an illuminated malfunction indicator lamp (MIL) with diagnostic trouble codes (DTCs) P0132, P0135, P0138, P0141, P0152, P0155, P0158 and/or P0161 stored in the powertrain control module (PCM). This may be due to water intrusion into heated oxygen sensor (HO2S) connectors C141, C142, C1571 and/or C1572 on the transmission harness where it connects to the engine exhaust sensors. To correct the condition, follow the Service Procedure steps to replace the transmission harness and the affected heated oxygen sensors (HO2S) and/or the catalyst monitor sensor.
SSM 492922020-11-04. Service bulletin. ELECTRICAL SYSTEM:SOFTWARE; POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE (TCM/PCM/TECM). Some 2018-2020 Ford and Lincoln vehicles may exhibit inoperative remote features via the Ford Pass/Lincoln Way mobile app, incomplete user authorization, no modem electronic serial number (ESN) displayed or DTCs U2100 and/or B156D in the telematics control unit (TCU). These symptoms may persist even after performing a TCU software update and/or replacement. To correct this condition, start a new session with the latest version of the appropriate diagnostic scan tool and perform a PMI on the TCU. If issues persist, open a hotline assistance request and include the IDS version (if applicable) used to perform the PMI and the Authorization Status PID value in the TCU datalogger. For claiming use causal part 14H092 and applicable labor times in Section 10 of the Service Labor Time Standards (SLTS) Manual.
TSB 20-23362020-10-02. Service bulletin. POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE (TCM/PCM/TECM); ELECTRICAL SYSTEM:SOFTWARE; ENGINE AND ENGINE COOLING. Some 2020 F-Super Duty vehicles equipped with a 6.7L engine built on or before 19-Aug-2020 may exhibit an illuminated malfunction indicator lamp (MIL) with diagnostic trouble codes (DTC) P0300-P0308, P0603, P203B, P208B, P208C, P2201, P24C2, P27B4, P07F6 and/or P27B5 stored in the powertrain control module (PCM). The vehicle may also exhibit a forced idle condition. This may be due to various strategies within the PCM software. To correct the condition, follow the Service Procedure to reprogram the PCM.
SSM 490642020-09-04. Service bulletin. POWER TRAIN. Some 2020 F-Super Duty vehicles equipped with a 6.7L diesel engine may exhibit a no crank concern with an illuminated malfunction indicator lamp (MIL) due to low fuel level or low fuel pressure. The most common diagnostic trouble codes (DTCs) associated with a low fuel pressure concern are P0087 and P008A. Prior to performing Powertrain Controls and Emissions Diagnosis (PC/ED) Section diagnostics for a no crank concern, verify the vehicle is not out of fuel or has a low fuel pressure concern. The no crank symptom after a low fuel pressure event is new for the 2020 model year.
SSM 490632020-09-04. Service bulletin. POWER TRAIN. Some 2017-2020 F-Super Duty vehicles equipped with a 6.7L diesel engine may exhibit an illuminated malfunction indicator lamp (MIL) and diagnostic trouble code (DTC) P20EE. The Powertrain Controls and Emissions Diagnosis (PC/ED) pinpoint test RD15 has been updated to perform a diesel particulate filter (DPF) manual regeneration with the appropriate Ford diagnostic scan tool twice along with performing a diesel particulate filter (DPF) parameter reset and drive cycle.
SSM 491402020-09-02. Service bulletin. ELECTRICAL SYSTEM; POWER TRAIN. Some 2020 F-Super Duty vehicles equipped with a 6.7L diesel engine and built on or before 18-Aug-2020 may exhibit an illuminated powertrain malfunction indicator (wrench) lamp with only diagnostic trouble code (DTC) P07F6 stored in the transmission control module (TCM). This DTC may be accompanied by harsh engagements, a poor shift quality feel and/or loss of 9th gear as a result of the DTC being set. If no additional codes or symptoms are present, clear the DTC with the appropriate Ford diagnostic scan tool and schedule a follow-up appointment for service mid-September. Inform the customer that engineering is working to implement a solution and advise the customer that they can continue to drive the vehicle. Once available, contact the customer and confirm a service appointment. Monitor OASIS for updates.
SSM 489582020-07-08. Service bulletin. EQUIPMENT:ELECTRICAL; POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE (TCM/PCM/TECM). Some 2020 Super Duty vehicles equipped with an 10R140 automatic transmission may exhibit an illuminated malfunction indicator lamp (MIL) and/or wrench light with diagnostic trouble codes (DTCs) P0715, P0716, P0717, P0718, P07BF and/or P07C0 stored in the powertrain control module (PCM). If any of these DTCs are set, focus diagnostics on the turbine shaft speed sensor (TSS) and/or TSS circuits. Refer to Workshop Manual (WSM), Section 307-01. Replacement of the ISSA or ISSB sensor will not correct this condition.
SSM 488202020-06-04. Service bulletin. POWER TRAIN:AUTOMATIC TRANSMISSION; ENGINE AND ENGINE COOLING. Some 2020 F-350, F-450, and F-550 F-Super Duty chassis cab vehicles equipped with a 6.7L diesel engine and 10R140 automatic transmission may exhibit a delay/bump feel when pulling away from a stop. This may be due to the neutral idle feature that automatically reduces the load on the engine when the vehicle stops, and the gear selector is in DRIVE to reduce fuel consumption and emissions. The transmission automatically resumes operation when the brake is released. The neutral idle feature activates when the transmission is sufficiently warmed, and the vehicle is on level grade. Do not attempt any repairs for this condition. Refer to Owners Manual Transmission Section for more information.
SSM 487612020-05-04. Service bulletin. POWER TRAIN. Some 2020 F-Super Duty vehicles equipped with a 6.2L or 7.3L gas engine and a 10R140 transmission may exhibit an intermittent buzz noise coming from the transmission while the vehicle is in transport mode. This condition is most noticeable with the vehicle in PARK or NEUTRAL and at elevated idle speeds of 850 to 1250 revolutions per minute (RPM). This condition is a normal characteristic while in transportation mode and will be eliminated once the vehicle is placed into normal mode prior to customer delivery. Do not attempt to repair.
TSB 20-20742020-04-02. Service bulletin. ELECTRICAL SYSTEM; POWER TRAIN. Some 2020 F-Super Duty vehicles equipped with a 6.2L/7.3L gas engine and 10R140 transmission built on or before 5-Dec-2019 may exhibit an illuminated malfunction indicator lamp (MIL) with diagnostic trouble code (DTC) P27B4 stored in the powertrain control module (PCM). This may be due to various strategies within the PCM software. To correct the condition, follow the Service Procedure to reprogram the PCM.
TSB 20-20442020-03-03. Service bulletin. POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE (TCM/PCM/TECM); ELECTRICAL SYSTEM. Some 2020 F-Super Duty vehicles equipped with a 6.7L engine built on or before 5-Feb-2020 may exhibit an illuminated malfunction indicator lamp (MIL) with diagnostic trouble codes (DTC) P203B, P2201 and/or DTC P274B stored in the powertrain control module (PCM). This may be due to various strategies within the PCM software. To correct the condition, follow the Service Procedure to reprogram the PCM.
TSB 20-20432020-03-03. Service bulletin. POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE (TCM/PCM/TECM); POWER TRAIN:MANUAL TRANSMISSION:COLUMN SHIFT ASSEMBLY. Some 2020 F-Super Duty vehicles equipped with a 6.7L engine and 10R140 transmission and built on or before 15-Jan-2020 may exhibit harsh upshifts between 1st and 5th gears. This may be due to various strategies within the transmission control module (TCM) software. To correct the condition, follow the Service Procedure to reprogram the TCM.
SSM 484572020-02-04. Service bulletin. POWER TRAIN. 2020 F-Super Duty vehicles equipped with a 10R140 automatic transmission at times may exhibit a normal skip shift upshifting and downshifting strategy. Typical examples are 1-3 or 3-5 upshift or a 6-4 coasting downshift. This is a normal characteristic and no repairs should be attempted for this condition. For more detailed information about the 10R140 skip gear shift strategy refer to the Workshop Manual (WSM), Section 307-01 > Diagnosis and Testing.

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