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Service bulletins for the 2021 Ford F-150

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.

644 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 522952024-03-05. Service bulletin. ENGINE AND ENGINE COOLING; POWER TRAIN. Some 2021-2023 F-150 and 2023-2024 Expedition/Navigator vehicles equipped with a 3.5L EcoBoost engine may exhibit a rattle/scraping noise from the bellhousing area on start-up. This may be due to the torque converter studs contacting the engine-to-transmission spacer plate (separator plate). To correct this condition, remove the transmission and flexplate and inspect the engine-to-transmission spacer plate and torque converter studs for wear/damage. If wear/damage is found, replace engine-to-transmission spacer plate. Refer to Workshop Manual (WSM) Section 303-01 Engine - 3.5L EcoBoost (BM), Removal and Installation, Crankshaft Rear Seal. When reinstalling the starter motor, be sure the starter is flush with the engine-to-transmission spacer plate prior to tightening the studbolts. Failure to do so may result in damaging newly installed engine-to-transmission spacer plate.
SSM 522442024-02-14. Service bulletin. ENGINE AND ENGINE COOLING; POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE (TCM/PCM/TECM). Some 2021-2023 F-150 vehicles equipped with a 3.5L PowerBoost hybrid engine, 2020-2023 Explorer vehicles equipped with a 3.3L hybrid engine and 2020-2023 Aviator vehicles equipped with a 3.0L hybrid engine may exhibit a malfunction indicator lamp (MIL) with diagnostic trouble code (DTC) P0A1E stored in the powertrain control module (PCM) and auto start/stop disabled. This may be due to a loose wiring connection to the belt integrated starter generator (BISG). The Workshop Manual (WSM) has recently been updated to provide new direction for DTC P0A1E. Refer to the WSM, Section 303-06 Starting System, Diagnosis and Testing, Starting System for applicable diagnosis.
SSM 522182024-02-06. Service bulletin. ENGINE AND ENGINE COOLING. Some 2021-2023 F-150 non-Lightning vehicles may exhibit reduced power and/or lack of acceleration above 4000 revolutions per minute (RPM) and/or not being able to shift above 4000 RPM. This may be due to the missing retainers (service part number W714040-S300) from the air cleaner intake. Prior to performing other diagnostics, inspect the air cleaner intake to determine if the retainers are present and fully seated. If the retainers are not present, install as necessary. Refer to the Workshop Manual (WSM), Section 303-12C Intake Air Distribution and Filtering - 3.5L EcoBoost (BM), Removal and Installation, Air Cleaner, Removal, Step 4. If the retainers are present, or the missing retainers were replaced and the symptom is still present, refer to the WSM for additional diagnostics. For claiming, use causal part 9C675 and applicable labor operations in Section 06 of the Service Labor Time Standards (SLTS) Manual.
TSB 23-23472023-11-21. Service bulletin. ENGINE AND ENGINE COOLING; EQUIPMENT. This article supersedes TSB 23-2279 to update the Service Procedure. Some 2021-2023 F-150 vehicles equipped with a 3.5L PowerBoost hybrid engine, 2020-2023 Explorer vehicles equipped with a 3.3L hybrid engine and 2020-2023 Aviator vehicles equipped with a 3.0L hybrid engine may exhibit a powertrain malfunction indicator lamp (MIL) with diagnostic trouble code (DTC) P0A1E stored in the powertrain control module (PCM). This may be due to the belt integrated starter generator (BISG). To correct this condition, follow the Service Procedure to diagnose and repair this symptom.
TSB 23-23412023-11-21. Service bulletin. ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:MANIFOLD/HEADER/MUFFLER/TAIL PIPE; ENGINE AND ENGINE COOLING:EXHAUST SYSTEM. This article supercedes TSB 22-2388 to update the Service Procedure and vehicle model years affected. Some 2021-2023 F-150 Raptor vehicles may experience a rattle noise from the exhaust at the exhaust tailpipe actuators. This may be due to the exhaust tailpipe actuator valves rattling inside the muffler assembly. To correct the condition, follow the Service Procedure to reprogram the powertrain control module (PCM) and install new exhaust tailpipe actuator and/or valve springs on the exhaust tailpipe actuator valves.
SSM 520502023-11-15. Service bulletin. ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:MANIFOLD/HEADER/MUFFLER/TAIL PIPE. Some 2021-2023 F-150 hybrid vehicles equipped with a 3.5L PowerBoost engine built on or before 01-Mar-2023 may exhibit an illuminated malfunction indicator lamp (MIL) with DTCs P237C, P2C22 and/or P2C23 in the powertrain control module (PCM). This may be due to the exhaust heat exchanger bypass control valve. To correct this condition replace the muffler inlet pipe. Refer to Workshop Manual (WSM), Section 309-00D Exhaust System - 3.5L V6 PowerBoost (CN), Removal and Installation. For claiming, use causal part 5A212 and applicable labor times in Section 05 of the Service Labor Time Standards (SLTS) Manual.
SSM 519502023-10-06. Service bulletin. POWER TRAIN; ENGINE AND ENGINE COOLING. Some 2021-2023 F-150 vehicles equipped with a 3.5L PowerBoost engine may exhibit an illuminated powertrain malfunction (wrench) lamp with diagnostic trouble code (DTC) P084B stored in the powertrain control module (PCM)
TSB 23-21952023-06-29. Service bulletin. POWER TRAIN; ENGINE AND ENGINE COOLING. Some 2021-2023 F-150 vehicles equipped with a 3.3L engine may exhibit an illuminated MIL in the instrument panel cluster (IPC) with DTC P0171 stored in the powertrain control module (PCM). This may be due to the software level of the PCM. To correct this issue, follow the Service Procedure to reprogram the PCM to the latest software level using the Ford Diagnosis and Repair System (FDRS).
SSM 516652023-05-29. Service bulletin. ENGINE AND ENGINE COOLING. Some 2021-2023 Ford and Lincoln vehicles equipped with a 2.7L or 3.0L engine may exhibit an upper engine thump/knock noise coming from the left cylinder head. This condition is most noticeable at idle and may lessen at higher engine speed or while driving. This condition does not affect vehicle durability and will not get worse over time. Use a stethoscope or chassis ears and listen just behind the left cylinder head intake VCT solenoid on the cam cover to determine if the thump/knock noise is coming from the cylinder head/camshaft. The left cylinder head and the camshaft roller followers are available as service parts.
SSM 515422023-05-04. Service bulletin. ENGINE AND ENGINE COOLING; POWER TRAIN. Some 2020-2023 F-150 and 2021-2023 Bronco vehicles equipped with a 2.7L or 3.0L EcoBoost engine may exhibit a ticking/tapping or rattle type noise from the top front cover area of the engine on initial start-up after a cold soak of 6 hours or more that may last for 2-5 seconds. This may be due to a stuck internal component of the variable cam timing (VCT) unit. To correct the condition, replace all 4 of the VCT units following Workshop Manual (WSM), Section 303-01. For claiming, use causal part 6C525 and applicable labor operations in Section 6 of the Service Labor Time Standards (SLTS) Manual. If labor times are not available, claim M-time.
SSM 514852023-04-05. Service bulletin. ENGINE AND ENGINE COOLING. Some 2021-2023 F-150 vehicles equipped with a 3.5L PowerBoost engine may experience a loss of engine coolant with possible engine overheat and/or illuminated malfunction indicator (MIL). This may be due to a crack in the exhaust heat exchanger coolant spigots on the top of the exhaust heat exchanger. The exhaust heat exchanger coolant spigots are now released and should be serviced in pairs. It is no longer necessary to replace the muffler inlet pipe assembly for this type of concern. Workshop Manual, Section 309-00D has been updated to include a new service procedure. For claiming, use causal part 18663 and applicable labor operations in Section 05 of the Service Labor Time Standards (SLTS) Manual. Heat exchanger coolant spigots - NL3Z-18663-A (2 req).
SSM 514112023-04-04. Service bulletin. ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:EMISSION CONTROL. Some 2021-2022 F-150 vehicles may not be able to communicate with some emissions testing equipment. Engineering is aware of the concern and is currently working on a solution expected in 2nd Quarter 2023. Monitor OASIS for updates. As a temporary corrective action, technicians may attempt one of the following: (a) Leave the engine running when performing the emissions test, even when the machine prompts to shut the engine off. (b) If a Ford Diagnosis and Repair System (FDRS) tool is available at the same location as the emissions testing equipment, use the FDRS tool to download and run the On-Demand DTC self-test on the audio front control module (ACM) and clear diagnostic trouble codes (DTCs) in the ACM, even if none are present. Then within the same key cycle, connect to the emissions test machine and perform the emissions test immediately.
TSB 23-20152023-01-31. Service bulletin. POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE (TCM/PCM/TECM); ENGINE AND ENGINE COOLING. 2021-2022 F-150 vehicles with 2.7L, 3.3L, 3.5L EcoBoost or 5.0L engines, 2020-2022 Transit vehicles with 3.5L Duratec/3.5L EcoBoost engines, 2023 Bronco with the 2.3L engine having charging system diagnostics performed in the Workshop Manual (WSM) may experience the generator voltage desired (GENVDSD) parameter identification (PID) missing from the powertrain control module (PCM) PID list in the Ford Diagnosis And Repair System (FDRS) scan tool. This may be due to a software parameter in the PCM. To correct the condition, follow the Service Procedure to reprogram the PCM.
TSB 22-23932022-11-01. Service bulletin. ENGINE AND ENGINE COOLING. Some 2019-2021 F-150 vehicles built on or before 04-Mar-2021 and equipped with a 5.0L engine may experience an illuminated malfunction indicator lamp (MIL) and diagnostic trouble codes (DTC) P0171, P0172, P0174, P0175, P0364, P060B, P062B, P1104, P164C, P2601, P2BEC, P2BED, P2BEE, P2BEF, P2BF0, P2BF1, P2BF2 and/or P2BF3 stored in the powertrain control module (PCM). This may be due to various software parameters within the PCM. To correct the condition, follow the Service Procedure to reprogram the PCM and reset the keep alive memory (KAM).
TSB 22-23862022-11-01. Service bulletin. ENGINE AND ENGINE COOLING. Some 2018-2021 F-150 vehicles equipped with the 3.0L diesel engine may experience low oil pressure at idle after an oil change. This condition may be caused by a broken anti-drain back oil plug in the oil filter adapter. The anti-drain back oil plug is now available to be serviced separately from the oil filter adapter. To correct this condition, follow this service procedure to replace the anti-drain back oil plug.
SSM 511342022-10-25. Service bulletin. ENGINE AND ENGINE COOLING. Some 2021-2022 F-150 vehicles equipped with a 3.5L PowerBoost engine and built on or before 18-Apr-2022 may experience a loss of engine coolant with possible engine overheat and/or illuminated malfunction indicator (MIL). This may be due to a crack in the exhaust heat exchanger coolant spigots on the top of the exhaust heat exchanger. The exhaust heat exchanger coolant spigots are now released and should be serviced in pairs. It is no longer necessary to replace the muffler inlet pipe assembly for this type of concern. Workshop Manual, Section 309-00D has been updated to include a new service procedure. For claiming, use causal part 5A212 and applicable labor operations in Section 05 of the Service Labor Time Standards (SLTS) Manual. Heat exchanger coolant spigots - NL3Z-18663-A (2 req).
TSB 22-23572022-10-04. Service bulletin. ENGINE AND ENGINE COOLING. Some 2021-2022 F-150 vehicles equipped with a 2.7L EcoBoost engine and built on or before 26-Aug-2022 may experience an illuminated malfunction indicator lamp (MIL) with diagnostic trouble codes (DTCs) P2ABA, P2ABC, P2AB7 and/or P2AB9 stored in the powertrain control module (PCM). This may be due to the software parameters in the PCM. To correct the condition, follow the Service Procedure to reprogram the PCM.
SSM 511032022-10-03. Service bulletin. ENGINE AND ENGINE COOLING. Some 2021-2022 F-150 vehicles equipped with a 3.5L PowerBoost engine and built on or before 18-Apr-2022 may experience a loss of engine coolant with possible engine overheat and/or illuminated malfunction indicator (MIL). This may be due to a crack in the exhaust heat exchanger coolant spigots on the top of the exhaust heat exchanger. The exhaust heat exchanger coolant spigots are now released and should be serviced in pairs. It is no longer necessary to replace the muffler inlet pipe assembly for this type of concern. Workshop Manual, Section 309-00D has been updated to include a new service procedure. For claiming, use causal part 18663 and applicable labor operations in Section 05 of the Service Labor Time Standards (SLTS) Manual. Heat exchanger coolant spigots - NL3Z-18663-A (2 req).
SSM 509882022-08-15. Service bulletin. ENGINE AND ENGINE COOLING. Some 2018-2021 F-150 3.3L, 2020-2021 Explorer 3.3L, and 2020-2021 Transit 3.5L may experience an illuminated low oil pressure and malfunction indicator lamp (MIL) with diagnostic trouble code (DTC) P0521 stored in the powertrain control module (PCM) after a short block or long block replacement. This may be due to a design change of the engine oil pressure (EOP) sensor, which is not backwards compatible. To correct the condition, transfer the sensor from the original engine or replace the EOP sensor with GN1Z-9D290-D.
SSM 509762022-08-02. Service bulletin. POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE (TCM/PCM/TECM); POWER TRAIN:MANUAL TRANSMISSION:CONTROL MODULE (TCM/PCM/TECM); ENGINE AND ENGINE COOLING:ENGINE; ELECTRICAL SYSTEM. Some 2021-2022 F-150 vehicles equipped with a 3.5L PowerBoost engine may exhibit an illuminated powertrain malfunction (wrench) indicator with DTC P2C44:00 stored in the powertrain control module (PCM). This may be due to an issue with ground circuit GD132 or the auxiliary battery isolator. Perform Pinpoint Test I in Workshop Manual (WSM), Section 303-06D and make sure the integrity of GD132 is carefully inspected and tested with the inclusion of G102, C146 and C1989C. Then perform the Auxiliary Battery Conditions(s) Test in WSM, Section 414-01, Pinpoint Test B. If no issues are found in Pinpoint Test I, GD132 and the auxiliary battery condition test passes, replace the auxiliary battery isolator per WSM, Section 414-01. For claiming, use causal part 14526 and applicable labor operations in Section 10 of the Service Labor Time Standards (SLTS) Manual.
SSM 509632022-08-02. Service bulletin. ENGINE AND ENGINE COOLING:EXHAUST SYSTEM. Some 2021-2022 F-150 Raptor vehicles built on or before 06-Jun-2022 may experience a rattle noise from the exhaust near the exhaust tailpipe actuators. This condition does not affect vehicle durability and no additional diagnosis or service is required for this condition at this time. Inform customers that they can continue to drive the vehicle, and engineering is currently working on a solution for this condition that is expected in September 2022. Replacement of the muffler will not resolve this condition. Monitor OASIS for additional information and schedule service appointments for customers once the repair becomes available.
SSM 508352022-06-17. Service bulletin. ENGINE AND ENGINE COOLING. Some 2021-2022 F-150 vehicles built on or before 08-Mar-2022 and some 2021-2022 Expedition/Navigator vehicles built on or before 14-Mar-2022 equipped with a 3.5L EcoBoost engine may experience a coolant leak at the thermostat housing. This may be due to an incomplete weld on the thermostat housing which can leak during normal vehicle operation. To correct the condition, replace the thermostat housing using service part number ML3Z-8A586-C. Refer to Workshop Manual (WSM), Section 303-03. For claiming, use causal part 8A586 and applicable labor operations in Section 08 of the Service Labor Time Standards (SLTS) Manual.
TSB 22-21982022-06-13. Service bulletin. ENGINE AND ENGINE COOLING; EQUIPMENT ADAPTIVE/MOBILITY. Some 2021-2022 F-150 Raptor/Tremor vehicles equipped with a 3.5L EcoBoost engine may experience reduced engine power with an illuminated malfunction indicator lamp (MIL) and diagnostic trouble code (DTC) P0299 stored in the powertrain control module (PCM). This may be due to the upper radiator air deflector fit and possible interference with the engine air cleaner fresh air inlet. To correct the condition, follow the Service Procedure to replace the affected turbocharger and related components.
TSB 22-21512022-05-02. Service bulletin. ENGINE AND ENGINE COOLING. Some 2021 F-150 vehicles equipped with a 3.5L PowerBoost engine and built on or before 23-Apr-2021 may experience an illuminated malfunction indicator lamp (MIL) with diagnostic trouble codes (DTCs) P0300, P0301-P0306, P0316, P050E, P1674, P0454 and/or P2451 stored in the powertrain control module (PCM). This may be due to various software parameters within the PCM. To correct the condition, follow the Service Procedure to reprogram the PCM.
TSB 22-21512022-04-26. Service bulletin. POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE (TCM/PCM/TECM); ENGINE AND ENGINE COOLING; ELECTRICAL SYSTEM:SOFTWARE. Some 2021 F-150 vehicles equipped with a 3.5L PowerBoost engine and built on or before 23-Apr-2021 may experience an illuminated malfunction indicator lamp (MIL) with diagnostic trouble codes (DTCs) P0300, P0301-P0306, P0316, P050E, P1674, P0454 and/or P2451 stored in the powertrain control module (PCM). This may be due to various software parameters within the PCM. To correct the condition, follow the Service Procedure to reprogram the PCM.

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