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Service bulletins for the 2021 Lincoln Aviator

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.

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

By type

By component

By trouble code

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

Bulletins, newest first
SSM 519392023-10-06. Service bulletin. POWER TRAIN. Some 2017-2023 Ford and Lincoln vehicles equipped with a 10R60/10R80/10R80 MHT/10R100 transmission may exhibit a whine noise at idle and/or while driving. This may be identified as coming from the bellhousing and the front of the transmission fluid pan. The whine noise may become louder when the transmission is at operating temperature and may increase with engine revolutions per minute (RPM) in the park (P) position. A small amount of whine noise is considered to be characteristic of the 10R60/10R80/10R80 MHT/10R100 transmissions due to the offset gear drivetrain in the front support and has no effect on durability. Use the Report a Vehicle Concern link at the bottom of OASIS to submit a report if there is a customer concern of whine noise describing operating conditions and noise severity.
SSM 519172023-10-04. Service bulletin. POWER TRAIN. Some 2020-2021 Explorer/Aviator/Police Interceptor Utility vehicles equipped with AWD may exhibit a binding or shudder sensation while turning and/or while accelerating from low speeds. The concern may also be described as a grinding and/or chatter noise. If the Workshop Manual (WSM) leads to replacement of the rear axle, inspect the differential for damage and differential fluid for metallic chunks in the fluid. Note that some metallic flake in the fluid and/or discoloration is normal and the rear axle should not be replaced for it. If no damage is found to the rear differential, it is not recommended to replace the rear axle assembly. Refer to WSM Symptom Charts (Section 308-07A for 2020 model year; Section 307-07A for 2021 model year) for diagnosis of the transfer case instead.
TSB 23-22792023-09-26. Service bulletin. POWER TRAIN. Some 2021-2023 F-150 vehicles equipped with a 3.5L 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 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 23-20722023-09-26. Service bulletin. POWER TRAIN. Some 2020-2023 Explorer/Aviator all-wheel drive (AWD) vehicles with a hybrid powertrain may experience a harshness and/or vibration felt through the seat, steering wheel and/or center console at 25-50 mph (40-80 km/h). This may be due to constant velocity (CV) joint instability at dynamic angles close to zero. To correct the condition, follow the Service Procedure to install a driveline shim.
SSM 518812023-09-03. Service bulletin. ENGINE AND ENGINE COOLING; POWER TRAIN. 2020-2023 Explorer non-hybrid vehicles and equipped with a 3.0L EcoBoost or 3.3L Duratec engine and 2020-2023 Aviator non-hybrid vehicles equipped with a 3.0L EcoBoost engine built on or before 01-Jan-2023 may exhibit an exhaust rattle requiring replacement of the left or right exhaust flexible pipe (5G203). The updated part locates the flexible joint portion of the pipe closer toward the catalytic converter than the originally equipped part. This is due to a design change with these replacement components which will not cause any functional issues with the vehicle.
TSB 23-22502023-08-30. Service bulletin. POWER TRAIN. This article supersedes TSB 22-2428 and 23-2176 to update the Issue, Action and Service Procedure. Some 2017-2023 F-150, 2018-2023 Expedition/Navigator/Mustang, 2019-2023 Ranger, 2020-2023 Explorer/Aviator/Transit and 2021-2023 Bronco vehicles equipped with a 10R60/10R80/10R80MHT transmission may exhibit a harsh/delayed engagement and/or harsh/delayed shift, an illuminated malfunction indicator lamp (MIL) with diagnostic trouble codes (DTC) P0751, P0752, P0756, P0757, P0761, P0762, P0766, P0767, P0771, P0772, P2700, P2701, P2702, P2703, P2704, P2705, P2707, P2708, P0729, P0731, P0732, P0733, P0734, P0735, P0736, P076F, P07D9, P07F6 and/or P07F7 stored in the powertrain control module (PCM) or transmission control module (TCM). This may be due to the software in the powertrain control module (PCM) or transmission control module (TCM), the transmission solenoid ID strategy, sticking valves in the main control valve body and/or axial movement of the CDF clutch cylinder (7H351) sleeve. To correct the condition, follow the Service Procedure to identify and correct the condition.
SSM 518362023-08-14. Service bulletin. POWER TRAIN. Some 2020-2021 Aviator vehicles equipped with all-wheel drive (AWD) built on or before 30-Aug-2021 may require replacement of the left front halfshaft, part number L1MZ-3A427-G. If the halfshaft is unavailable due to a part backorder situation, dealers can perform Technical Service Bulletin (TSB) 23-2174. The TSB Service Procedure uses a revised halfshaft and intermediate shaft, which eliminates the front axle disconnect actuator assembly and requires an all-wheel-drive (AWD) module software update. Unless the specific TSB criteria are met, TSB 23-2174 should not be performed if halfshaft part number L1MZ-3A427-G is available.
SSM 518212023-08-10. Service bulletin. POWER TRAIN:TRANSFER CASE (4-WHEEL DRIVE); SUSPENSION:REAR:AXLE:NON-POWERED AXLE ASSEMBLY; POWER TRAIN. Some 2020-2021 Explorer/Aviator/Police Interceptor Utility vehicles equipped with AWD may exhibit a binding or shudder sensation while turning and/or while accelerating from low speeds. The concern may also be described as a grinding and/or chatter noise. If the Workshop Manual (WSM) leads to replacement of the rear axle, inspect the differential for damage and differential fluid for metallic chunks in the fluid. Note that some metallic flake in the fluid and/or discoloration is normal and the rear axle should not be replaced for it. If no damage is found to the rear differential, it is not recommended to replace the rear axle assembly. Instead, refer to the Symptom Charts in WSM, Section 307-07A for further diagnosis of the transfer case.
TSB 23-21742023-08-02. Service bulletin. ELECTRICAL SYSTEM; POWER TRAIN. Some 2020-2021 Explorer/Aviator vehicles equipped with all-wheel drive (AWD) built on or before 30-Aug-2021 may exhibit an illuminated powertrain malfunction (wrench) indicator with diagnostic trouble codes (DTC) C00A6 and/or C0631. This may be due to the front axle disconnect actuator/intermediate shaft. To correct the condition, follow the Service Procedure to replace the front axle disconnect actuator/intermediate shaft with a revised intermediate shaft.
SSM 517752023-07-12. Service bulletin. POWER TRAIN; EQUIPMENT. Some 2020-2021 Aviator vehicles equipped with all-wheel drive (AWD) built on or before 30-Aug-2021 may require replacement of the left front halfshaft, part number L1MZ-3A427-G. If the halfshaft is unavailable due to a part backorder situation, dealers can perform Technical Service Bulletin (TSB) 23-2114. The TSB Service Procedure uses a revised halfshaft and intermediate shaft, which eliminates the front axle disconnect actuator assembly and requires an all-wheel-drive (AWD) module software update. Unless the specific TSB criteria are met, TSB 23-2144 should not be performed if halfshaft part number L1MZ-3A427-G is available.
SSM 516872023-06-16. Service bulletin. UNKNOWN OR OTHER; EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL; POWER TRAIN. TSB 22-2428 is missing some labor operations. For any missing labor operations, claim available new model labor operations or m-time. Refer to this article on the repair order. When replacing the CDF cylinder, the current TSB does not require a complete transmission overhaul or cooler and converter flushing. Ford is currently reviewing the TSB. Monitor OASIS for updates.
SSM 517012023-06-13. Service bulletin. ELECTRICAL SYSTEM; POWER TRAIN. Some 2020-2023 Aviator/Explorer vehicles equipped with a 3.0L hybrid engine may exhibit illuminated powertrain malfunction (wrench) indicator and stop safely now warning. Diagnostic trouble code (DTC) P0AA6:00 may be stored in the battery energy control module (BECM). Inspect the right side frame rail area near the bank 1 charge air cooler (CAC) intake pipe clamp for chafing the orange high voltage harness. If the harness is damaged, de-energize high voltage system per Workshop Manual (WSM), Section 414-03A. Reposition the clamp and replace the high voltage harness (14290). If the harness is not damaged continue P0AA6 diagnostics in WSM, Section 414-03A, Pinpoint Test T. For a P0AA6 diagnostic aid video, refer to Professional Technician System (PTS) > Home > Technical Assistance > Technical Support Videos > enter P0AA6 in search box and click video returned.
TSB 22-24282023-05-30. Service bulletin. POWER TRAIN. Some 2017-2023 F-150, 2018-2023 Expedition/Navigator/Mustang, 2019-2023 Ranger, 2020-2023 Explorer/Aviator/Transit and 2021-2023 Bronco vehicles equipped with a 10R60 transmission and built on or before 23-Dec-2022 or with a 18R80/10R80MHT transmission and built on or before 15-Aug-2022 may exhibit a harsh/delayed engagement and/or harsh/delayed shift. It is possible the vehicle may also have an illuminated malfunction indicator lamp (MIL) or diagnostic trouble codes (DTC) P0751, P0752, P0756, P0757, P0761, P0762, P0766, P0767, P0771, P0772, P2700, P2701, P2702, P2703, P2704, P2705, P2707, P2708, P0729, P0731, P0732, P0733, P0734, P0735, P0736, P076F, P07D9, P07F6 and/or P07F7 stored in the powertrain control module (PCM) or transmission control module (TCM). This may be due to the software in the PCM or TCM, the transmission solenoid ID strategy, sticking valves in the main control valve body and/or axial movement of the CDF clutch cylinder (7H351) sleeve.
TSB 23-21202023-05-23. Service bulletin. PARKING BRAKE; POWER TRAIN. Some 2018-2021 Expedition/Navigator and 2020-2021 Explorer/Aviator vehicles equipped with a 10R80/10R80 MHT or 10R60 may exhibit a momentary transmission neutral-out condition while in drive. Vehicle may also have diagnostic trouble code (DTC) P07E6 and/or P07E4 stored in the powertrain control module (PCM) or transmission control module (TCM) and/or a possible audible noise. This may be due to a leak in the park valve circuit. To correct the condition, follow the Service Procedure to inspect the park system hardware for wear or damage and replace the valve body separator plate with an improved valve body separator plate.
TSB 23-21142023-05-04. Service bulletin. POWER TRAIN. Some 2020-2021 Explorer/Aviator vehicles equipped with all-wheel drive (AWD) built on or before 30-Aug-2021 may exhibit an illuminated powertrain malfunction (wrench) indicator with diagnostic trouble codes (DTC) C00A6 and/or C0631. This may be due to the front axle disconnect actuator/intermediate shaft. To correct the condition, follow the Service Procedure to replace the front axle disconnect actuator/intermediate shaft with a revised intermediate shaft.
SSM 515312023-05-04. Service bulletin. POWER TRAIN. Some 2020-2023 Explorer/Aviator/Transit, 2021-2023 F-150/Bronco, 2022-2023 Expedition/Navigator/Mustang and 2023 F-250/F-350 Super Duty vehicles may exhibit harsh/delayed engagement and/or harsh/delayed shift concerns. These may be addressed with the powertrain control module (PCM)/transmission control module (TCM) Transmission Accelerated Main Control Break In Routine and/or a main control overhaul. Refer to Workshop Manual (WSM), Section 307-01, DTC Chart if DTCs are present and/or Diagnosis By Symptom to identify the clutch(s) to be cycled. Cycling the shift solenoids and clutch control valves to remove contamination must be performed along with an adaptive drive cycle before attempting repair. For claiming, use causal part 7A100 and applicable labor operations in Section 7 of the Service Labor Time Standards (SLTS) Manual.
SSM 514392023-04-05. Service bulletin. POWER TRAIN. Some 2020-2023 Explorer/Aviator 4x4/AWD vehicles with hybrid powertrain may experience a harshness and/or vibration felt through the seat, steering wheel and/or center console after initial driveaway between 25-50 MPH (40-80 Km/h) that lessens after driving 5-10 minutes. This may be due to driveshaft center bearing bounce mode during cold ambient temperatures. To resolve the concern, install a softer durometer L1MZ-4A499-F driveshaft center bearing per Workshop Manual Section 205-01. For claiming, use causal part 4A499 and applicable labor operations in Section 4 of the Service Labor Time Standards (SLTS) Manual.
SSM 514192023-04-04. Service bulletin. POWER TRAIN. Some 2017-2023 Ford and Lincoln vehicles equipped with a 10R60/10R80/10R80 MHT/10R100 transmission may exhibit a whine noise at idle and/or while driving. This may be identified as coming from the bellhousing and the front of the transmission fluid pan. The whine noise may become louder when the transmission is at operating temperature and may increase with engine revolutions per minute (RPM) in the park (P) position. A small amount of whine noise is considered to be characteristic of the 10R60/10R80/10R80 MHT/10R100 transmissions due to the offset gear drivetrain in the front support and has no effect on durability.
SSM 513742023-03-04. Service bulletin. POWER TRAIN; SERVICE BRAKES. Some 2020-2021 Escape/Bronco Sport/Explorer and 2020-2021 Corsair/Aviator vehicles equipped with electric brake booster (EBB) built on or before 1-Aug-2022 may exhibit an illuminated anti-lock brake system (ABS) warning indicator and stability-traction control warning indicator with diagnostic trouble code (DTC) U3000:96 erroneously stored in the ABS module. This condition occurs during connection or power interrupt to the EBB module. If this code is stored and the ABS system has been reassembled, clear the DTC code using Ford Diagnosis and Repair System (FDRS) scan tool and check for recurrence. If the DTC persists, perform normal diagnostics. Refer to the Workshop Manual (WSM), Section 206-09 Anti-Lock Brake System. For claiming use the causal part number 2C219 and applicable labor operations in Section 2 of the Service Labor Time Standards.
SSM 512972023-01-31. Service bulletin. POWER TRAIN. Some 2020-2023 Explorer/Aviator/Police Interceptor Utility vehicles equipped with a hybrid powertrain may exhibit an illuminated malfunction indicator lamp (MIL) with diagnostic trouble code (DTC) P2D40. This may be due to the high voltage battery thermal system not cooling as it should. Follow the updated WSM Section 414-03 including listed possible sources, visual inspection and prechecks, and diagnostic procedures.
TSB 23-20302023-01-31. Service bulletin. POWER TRAIN. 2020-2022 Aviator/Explorer/Police Interceptor, 2021-2022 F-150 vehicles equipped with a 10R80 MHT transmission and built on or before 15-Nov-2022 may exhibit an 8th gear start after coming to a stop and/or a no movement in Reverse condition. This may be due to the driver applying the accelerator pedal and brake pedal simultaneously during regenerative braking. To improve the condition, follow the Service Procedure to reprogram the powertrain control module (PCM) and refer the customer to the Automatic Transmission Section of the Owners Manual warning regarding applying both pedals simultaneously.
SSM 511372022-10-25. Service bulletin. POWER TRAIN. Some 2021-2022 Mustang Mach-E/Escape plug-in hybrid electric vehicle (PHEV), 2020-2022 Aviator PHEV, and 2022 Transit battery electric vehicle (BEV) vehicles may experience an illuminated powertrain malfunction (Wrench) indicator and/or malfunction indicator lamp (MIL) with secondary on board diagnostic control module (SOBDM) diagnostic trouble code (DTC) U3000:49. This may be due to an internal SOBDM concern. To correct the concern, replace the SOBDM following Workshop Manual, Section 414-03B Removal and Installation, Secondary On-board Diagnostic Control Module. For claiming use base part # 10B689 and the applicable labor operations of Section 10 of the Service Labor Time Standards (SLTS) Manual.
TSB 22-23422022-09-23. Service bulletin. ELECTRICAL SYSTEM; POWER TRAIN. Some 2020-2022 Explorer/Aviator/Police Interceptor Utility vehicles equipped with a hybrid powertrain may exhibit an illuminated MIL with diagnostic trouble code (DTC) P2D40. This may be due to the chiller not interpreting the correct cooling value of the high voltage battery chiller. To correct the condition, follow the Service Procedure to diagnose the cause of the incorrect value.
SSM 510322022-08-22. Service bulletin. POWER TRAIN:AUTOMATIC TRANSMISSION; ENGINE AND ENGINE COOLING. Some 2020-2022 Explorer/Aviator vehicles may exhibit automatic transmission fluid (ATF) contamination in the engine cooling system due to the transmission cooler. If the cooling system becomes contaminated with ATF, the system must be flushed clear of the contamination after the source of the contamination has been repaired. It is generally not necessary to replace the following components due to ATF contamination in the cooling system: radiator, heater core, de-gas bottle, water pump, auxiliary water pump, coolant control valves, temperature sensors, thermostat, turbocharger, heat exchangers, tubes, gaskets/O-rings/seals (unless removed), or rubber coolant hoses (unless swollen).
SSM 509002022-07-06. Service bulletin. POWER TRAIN. Some 2020-2022 Explorer/Aviator/Police Interceptor Utility vehicles may exhibit a rear differential that is venting rear axle fluid. This may result in a noise, smell, or leak noticed by the customer. Inspect the rear of the vehicle for signs of rear differential fluid venting in the right rear wheel well (oil staining in the wheel well liner and/or oil residue on the wheel end assembly below) or leaking from the rear differential. If signs of fluid leaks are found from any seals, repair as necessary. Refer to Workshop Manual (WSM), Section 205-02. If no seal leaks are found but fluid is venting, drain the rear differential and re-fill with fresh rear differential fluid. Remove the vent tube and use compressed air to verify that the fluid vent tube is clear. Reinstall the vent tube. Engineering is investigating, monitor OASIS for updates.

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