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Service bulletins for the 2020 Ford F-550

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.

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

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Only bulletins with component: Engine are shown. Show all

Bulletins, newest first
SSM 504482022-02-04. Service bulletin. FUEL SYSTEM, DIESEL; POWER TRAIN; ENGINE AND ENGINE COOLING:ENGINE:DIESEL. Some 2017-2022 F-Super-Duty vehicles equipped with a 6.7L diesel engine may exhibit a hard start, lack of power and/or runs rough concern with an illuminated malfunction indicator light (MIL) and diagnostic trouble codes (DTCs) P0087 and/or P008A. This may be due to low fuel level or fuel gelling in cold ambient temperatures. If no root cause is determined after normal Powertrain Control/Emissions Diagnosis (PC/ED) pinpoint test MA, recommend that the customer use a different brand of fuel and use Motorcraft® PM-23-A Diesel Fuel Anti-Gel and Performance Improver. Inform the customer that bio-diesel blended fuels have a higher occurrence of fuel gelling. Fuel gelling and or low fuel conditions causing a P0087 and/or P008A is not covered under warranty.
SSM 503862022-02-04. Service bulletin. ENGINE AND ENGINE COOLING. Some 2020-2022 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 21-24042022-02-04. Service bulletin. ENGINE AND ENGINE COOLING; ENGINE. Some 2015-2021 F-150, 2017-2021 Super Duty and 2018-2021 Expedition/Navigator vehicles may exhibit poor air conditioning (A/C) performance, loss of airflow and/or engine cooling fans running continuously from high A/C pressures. This concern may be from the evaporator freezing up due to the evaporator temperature sensor being biased. To correct the condition, follow the Service Procedure steps to replace the evaporator temperature sensor.
SSM 503422021-12-26. Service bulletin. ENGINE AND ENGINE COOLING. Some 2020-2022 F-Super Duty vehicles equipped with a 6.7L engine may experience a lack of power due to snow packing of the engine air cleaner when operating in extremely snowy conditions. Diagnostic trouble code (DTC) P1548 may be present in the powertrain control module (PCM). A heavy snow environment pre-filter service kit (service part LC3Z-9K635-AA) is now available for use but is not a warrantable item. It is recommended that the service kit be removed at temperatures greater than 50°F (10°C) and reinstall in subsequent winter seasons in order to maintain optimal vehicle performance.
SSM 503232021-12-26. Service bulletin. ENGINE AND ENGINE COOLING. Some 2017-2022 F-Super Duty and 2016-2022 F-650/F-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 503062021-12-07. Service bulletin. ENGINE AND ENGINE COOLING. Some 2018-2021 EcoSport, Expedition, Navigator; 2019-2021 Ranger; 2020-2021 Escape, Corsair, Explorer, Transit; 2021 Bronco, Bronco Sport, Edge, Nautilus, F-150, Mustang; 2019-2022 Transit Connect; 2020-2022 Aviator, F-Super Duty; and 2022 Maverick vehicles may exhibit an illuminated malfunction indicator lamp (MIL) with diagnostic trouble codes (DTC) P0496, P0456, P0455, P04F0, and/or P0451. Ford has tested returned EVAP canister purge valves and found them to be fully functional. Prior to replacing the canister purge valve or other EVAP components, perform the following tests using the Ford Diagnosis and Repair System (FDRS) Scan Tool: Full System EVAP Leak Test - FDRS Location: TOOLBOX > PCM > PCM - Evap Emissions System Test and the EVAP Purge Valve Leak Test - FDRS Location: TOOLBOX > PCM > Evap Emission System Toolbox > CPV Check.
TSB 21-23322021-09-30. Service bulletin. ENGINE AND ENGINE COOLING. Some 2017-2020 Super Duty vehicles equipped with a 6.7L engine built on or after 13-May-2017, 2015-2019 Transit vehicles equipped with a 3.2L engine and 2018-2020 F-150 vehicles equipped with a 3.0L engine may exhibit an illuminated malfunction indicator lamp (MIL) with diagnostic trouble code (DTC) P2002 stored in the powertrain control module (PCM). This may be due to a crack in the diesel particulate filter (DPF) substrate. To correct the condition, follow the Service Procedure steps to replace the DPF and then reprogram the PCM.
TSB 21-23082021-09-30. Service bulletin. ENGINE. Some 2020-2021 F-Super Duty vehicles equipped with a 6.7L engine may exhibit an illuminated malfunction indicator lamp (MIL) with diagnostic trouble codes (DTC) P0315, P054F and/or P02ED stored in the powertrain control module (PCM). This may be due to the software in the PCM. To correct the condition, follow the Service Procedure to reprogram the PCM.
TSB 21-22502021-09-30. Service bulletin. EQUIPMENT:APPLIANCE:AIR CONDITIONER; ENGINE AND ENGINE COOLING:COOLING SYSTEM:FAN. Some 2015-2020 F-150, 2017-2020 Super Duty and 2018-2020 Expedition/Navigator vehicles may exhibit poor air conditioning (A/C) performance, loss of airflow and/or engine cooling fans running continuously from high A/C pressures. This concern may be from the evaporator freezing up due to the evaporator temperature sensor being biased. To correct the condition, follow the Service Procedure steps to replace the evaporator temperature sensor.
SSM 498052021-06-01. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE:OTHER FUEL TYPES:TURBO/SUPERCHARGER; ENGINE AND ENGINE COOLING:EXHAUST SYSTEM; ENGINE AND ENGINE COOLING. Some 2011-2021 vehicles equipped with a diesel engine may have engine oil in the exhaust after turbocharger replacement for various reasons. To correct the condition, remove the exhaust and stand the exhaust up with the turbocharger inlet side facing down using a suitable drain pan. Allow the exhaust to drain for at least 24 hours and reinstall. Do not perform a manual exhaust regeneration.
SSM 497032021-03-31. Service bulletin. ENGINE AND ENGINE COOLING. Some 2020-2021 F-Super Duty vehicles equipped with a 6.7L engine may exhibit an illuminated malfunction indicator lamp (MIL) with only diagnostic trouble code (DTC) P0315 stored in the powertrain control module (PCM). If no drivability concerns are present, clear the DTC and retest. If the DTC returns, perform normal diagnostics per the Powertrain Control/Emissions Diagnosis (PC/ED) Manual. If the DTC does not return, inform the customer that Ford is developing a PCM software fix that is expected in June, 2021. Advise the customer that vehicle durability is not affected by the condition and they can continue to drive the vehicle. Schedule a follow up appointment for repair in June, 2021. Monitor OASIS for updates.
SSM 496872021-03-31. Service bulletin. ENGINE AND ENGINE COOLING. Some 2017-2021 F-Super-Duty vehicles equipped with a 6.7L diesel engine may exhibit a hard start, lack of power and/or runs rough concern with an illuminated malfunction indicator light (MIL) and diagnostic trouble codes (DTCs) P0087 and/or P008A. This may be due to low fuel level or fuel gelling in cold ambient temperatures. If no root cause is determined after normal Powertrain Control/Emissions Diagnosis (PC/ED) pinpoint test MA, recommend that the customer use a different brand of fuel and use Motorcraft PM-23-A Diesel Fuel Anti-Gel and Performance Improver. Inform the customer that bio-diesel blended fuels have a higher occurrence of fuel gelling. Fuel gelling and or low fuel conditions causing a P0087 and/or P008A is not covered under warranty.
SSM 496862021-03-31. Service bulletin. ENGINE AND ENGINE COOLING. Some 2020-2021 F-Super Duty vehicles equipped with a 6.7L engine may experience a lack of power due to snow packing of the engine air cleaner when operating in extremely snowy conditions. Diagnostic trouble code (DTC) P1548 may be present in the powertrain control module (PCM). A heavy snow environment pre-filter service kit (service part LC3Z-9K635-AA) is now available for use but is not a warrantable item. It is recommended that the service kit be removed at temperatures greater than 50F (10C) and reinstall in subsequent winter seasons in order to maintain optimal vehicle performance. The service kit instructions mention that air filter FA-2031 is required, however the heavy snow environment pre-filter service kit can be used with either engine air filter FA-1951, or FA-2031 once it is available.
TSB 20-20672021-03-02. Service bulletin. ELECTRICAL SYSTEM; ENGINE AND ENGINE COOLING. Some 2017-2020 F-Super Duty vehicles equipped with a 6.7L engine built on or before 10-Jun-2020 may exhibit an illuminated malfunction indicator lamp (MIL) with diagnostic trouble codes (DTCs) U029D, U029E, P22A7 and/or P2209 in the powertrain control module (PCM). This may be due to water intrusion into the oxides of nitrogen (NOx) connectors. To correct the condition, follow the Service Procedure to inspect the NOx sensor module and replace the 14406 wire harness.
SSM 494302021-02-04. Service bulletin. ENGINE AND ENGINE COOLING. 2011-2021 F-Super Duty and 2016-2021 F-650/F-750 vehicles equipped with a 6.7L engine may exhibit a high/elevated idle condition. During prolonged idle time, vehicles may experience this high/elevated idle to reduce buildup of unburned hydrocarbons from the SCR system. The powertrain control module (PCM) estimates hydrocarbon levels in the SCR and may increase idle speed to remove them. Idle speed will be increased to 1000 revolutions per minute (rpms) for ambient temperatures near 26C (80F) and may increase to as high as 1200 rpms at -40 C (-40F). These elevated idle periods can last from 20-40 minutes, depending on ambient temperatures. During power take off (PTO) use and already using idle set point control, the elevated speed is disabled. It is required that the operator monitor the vehicle and adhere to the Exhaust Filter warning messages.
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.
20B412020-12-05. Service bulletin. FUEL SYSTEM, GASOLINE; ENGINE; EQUIPMENT ADAPTIVE/MOBILITY; EQUIPMENT. Certain 2020 Model Year Super Duty and 2021 Model Year Medium Duty Vehicles Equipped with a 6.7L Engine Left Hand Side High Pressure Fuel Rail Replacement. In some of the affected vehicles, the vehicle may have been built with a high pressure fuel rail where the internal fuel orifice may become dislodged. If the fuel orifice becomes dislodged, it can travel down and damage the pressure control valve pintle resulting in a Diagnostic Trouble Code (DTC) P0088. Before demonstrating or delivering any new in-stock vehicles involved in this program, dealers are to replace the left hand side high pressure fuel rail using the technical instructions, even if DTC P0088 is not present. This service must be performed on all affected vehicles at no charge to the vehicle owner.
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 491852020-10-06. Service bulletin. ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:EMISSION CONTROL:CRANKCASE (PCV); ELECTRICAL SYSTEM. Some 2020 F-Super Duty and 2021 F-650/F-750 vehicles equipped with a 6.7L diesel engine built on 01-Mar-2020 and through 31-Aug-2020 may exhibit an illuminated malfunction indicator light (MIL) with diagnostic trouble code (DTC) P0088. This may be due to the pressure control valve in the left fuel rail. To correct the condition, replace the left fuel rail along with the pressure control valve (PCV). For F-250 through F-550 vehicles refer to Workshop Manual (WSM), Section 303-04B. For F-650/F-750 vehicles refer to WSM, Section 303-04A. For claiming use causal part 9D280 and applicable labor operations in Section 09 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.
TSB 20-22982020-10-01. Service bulletin. ENGINE AND ENGINE COOLING; EQUIPMENT ADAPTIVE/MOBILITY; ELECTRICAL SYSTEM. Some 2020 F-Super Duty vehicles may exhibit a condition where the engine will not turn off and/or have various electrical symptoms including a dead battery, horn stays on and no crank/no start. This may be a result of water/moisture intrusion into the battery junction box (BJB). The BJB is located under the hood of the vehicle. This water/moisture intrusion may be related to the BJB cover not installed completely or broken cover tabs/locking fingers allowing water/moisture into the BJB. To correct the condition, follow the Service Procedure steps to inspect for water/moisture intrusion into the BJB and replace the BJB if water/moisture intrusion is found.
SSM 490852020-09-04. Service bulletin. ELECTRICAL SYSTEM; EQUIPMENT; ENGINE. Some 2020 Ford and Lincoln vehicles equipped with a TCU may exhibit incomplete user authorization, no authorization pop-up on the SYNC infotainment system, vehicle connectivity concerns, vehicle location disabled message and/or various FordPass/LincolnWay App command/control concerns. To correct these conditions, ensure that customer connectivity settings (CCS) are turned on in the SYNC system. If the concerns persist after CCS is turned on, turn CCS OFF, perform an ignition cycle, and turn CCS settings back on. After any CCS changes, force-close and relaunch the FordPass/ LincolnWay app on the customers phone. Once CCS is turned on, program the TCU to the latest IDS/FDRS version level. If the concern is still present, follow normal diagnostics in Workshop Manual (WSM), Section 415-00. Refer to PTS OASIS home page for TCU version identification. For claiming, use causal part 14G229.
SSM 490652020-09-04. Service bulletin. ENGINE AND ENGINE COOLING; ELECTRICAL SYSTEM; FUEL SYSTEM, DIESEL. Some 2011-2020 F-Super Duty, 2015-2019 Transit, 2016-2021 F-650/F-750 and 2018-2020 F-150 vehicles equipped with a 6.7L, 3.2L or 3.0L engine may exhibit an illuminated MIL with diagnostic trouble codes (DTCs) P207F, P20EE, P229F, P2201 and/or P24AE. This may be a result of using aftermarket cleaning liquids or tools for the exhaust gas recirculation (EGR) cooler or intake. Ford does not recommend the cleaning of diesel intakes or EGR coolers using any aftermarket tool that injects a cleaning foam or liquid substance into the EGR cooler or intake. Using these types of fluids can result in sodium poisoning of the NOx and particulate matter (PM) sensors resulting in degraded operation and permanent damage to the after treatment system. Use of these cleaning tools may void the emissions warranty of the hot end after treatment exhaust system and the attached emissions sensors.
SSM 490622020-09-04. Service bulletin. ENGINE AND ENGINE COOLING. Some 2017-2020 F-Super-Duty vehicles equipped with a 6.7L diesel engine may exhibit hard start, lack of power or runs rough concern with malfunction indicator light (MIL) and diagnostic trouble codes (DTCs) P0087 and/or P008A. This may be due to low fuel level or fuel gelling in cold ambient temperatures. If no root cause is determined after normal PCED diagnostic test MA recommend that customer use a different brand of fuel and Motorcraft PM-23-A Diesel Fuel Anti-Gel and Performance Improver. Inform the customer that Bio Diesel blended fuels have a higher occurrence of fuel gelling. Fuel gelling and or low fuel conditions causing a P0087 and/or P008A is not covered under warranty.
TSB 20-22722020-09-02. Service bulletin. ENGINE AND ENGINE COOLING. Some 2015-2019 Transit vehicles equipped with a 3.2L engine, 2018-2020 F-150 vehicles equipped with a 3.0L engine, 2017-2020 Super Duty vehicles equipped with a 6.7L engine built on or after 13-May-2017 may exhibit an illuminated malfunction indicator lamp (MIL) with diagnostic trouble code (DTC) P2002 stored in the powertrain control module (PCM). This may be due to a crack in the diesel particulate filter (DPF) substrate. To correct the condition, follow the Service Procedure steps to replace the DPF.

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