# Service bulletin SSM 54643

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.

- Type: Service bulletin
- NHTSA id: 11029936
- Published by NHTSA: 2026\-03\-11
- Manufacturer's number: SSM 54643
- Manufacturer's date: 2026\-03\-10
- NHTSA component: UNKNOWN OR OTHER; POWER TRAIN; ENGINE

## NHTSA's summary

Some 2024\-2026 Nautilus non\-hybrid vehicles may exhibit a rattle or buzzing noise from under the center of the car during light throttle, low engine revolutions per minute \(RPM\) driving conditions, often between 30\-40 mph \(48\-64 km/h\). The noise may be more noticeable when ambient temperatures are below 40°F \(4°C\). Inform the customer that Ford is currently working on a solution for this condition that is expected Q4 2026. This concern does not affect vehicle durability and the customer can continue to drive the vehicle. Monitor Professional Technician System \(PTS\) for additional information and schedule a service appointment for the customer once the repair becomes available.\<br /\>\<br /\> If a customer vehicle exhibits this concern, submit a Vehicle Concern Report. To submit a report, click on the "Submit Global Concern Report \(GCR\)" link at the upper right of the PTS Vehicle ID screen \(vehicle identification number ÝVIN¨ required\) and fill out the form. Do not use the "Report A Problem" link to submit a report for this condition.

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2026/MC-11029936-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2026/MC-11029936-9999.pdf)

The document is the manufacturer's. This site does not hold it.

## Components

Engine, Transmission and driveline

## Vehicles listed

- 2024 to 2026 LINCOLN NAUTILUS

## Recalls for the same vehicles and component

- [2026094](/recalls/tc/2026094.md), 2026-03-03: Engine
- [26V122000](/recalls/nhtsa/26V122000.md), 2026-03-03: ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:EMISSION CONTROL:GAS RECIRCULATION VALVE \(EGR VALVE\)
- [2025281](/recalls/tc/2025281.md), 2025-05-23: Engine

## Other bulletins for the same vehicles and component

- [SSM 55212](/bulletins/11037777.md), 2026-10-02, Service bulletin: POWER TRAIN. Some 2024\-2026 Nautilus vehicles may exhibit a shudder/chatter/vibration from the rear drive unit \(RDU\) during low\-speed turns. Workshop Manual \(WSM\), Section 205\-02 \> Diagnosis and Testing \> Pinpoint Test "Grinding, Popping or Chattering \- Noise from the Rear Axle When the Vehicle is Turning" has been updated to address this condition.
- [SSM 55058](/bulletins/11035516.md), 2026-08-03, Service bulletin: POWER TRAIN; ELECTRICAL SYSTEM; ENGINE; FUEL/PROPULSION SYSTEM. Some 2025\-2026 Maverick vehicles built on or before 05\-Dec\-2025 and 2024\-2026 Nautilus vehicles built on or before 04\-Sep\-2025 may exhibit limited power and display "Stop Safely Now" or "Service Vehicle Soon" stored in the message center after start up with diagnostic trouble codes \(DTC\) P0A5D, P0A60, P0A63, P0A6F, P0A72, P0A75, and/or P0E52 stored in the inverter system controller \(SOBDMC\). The Ford Diagnostic and Repair System \(FDRS\) may refer to this module as the "Secondary On\-Board Control Module C". If the vehicle exhibits these conditions, replace the inverter system controller. Refer to Workshop Manual, Section 307\-01B. For claiming, use causal part 7B012 and labor operations 12651D and 12651D58. NOTE: This article does not remove any RVC, Prior Approval or Warranty and Policy requirements for component replacement.
- [25B33](/bulletins/11034207.md), 2026-07-01, Other: ENGINE. Certain 2023\-2025 Model Year Escape and Corsair, 2024\-2025 Model Year Nautilus, 2025\-2026 Model Year Bronco Sport and 2025 Model Year Maverick Vehicles Equipped with an Engine Block Heater System Block Heater Replacement
- [SSM 54924](/bulletins/11033907.md), 2026-06-16, Service bulletin: POWER TRAIN. Some 2024\-2026 Nautilus vehicles equipped with an 8F35 transmission may exhibit an illuminated malfunction indicator lamp \(MIL\) with diagnostic trouble codes \(DTC\) P0767, P0766 and/or P2703 stored in the powertrain control module \(PCM\) and harsh/no reverse engagement. This may be due to the selectable one\-way clutch \(SOWC\). To correct the condition, remove the transmission. Refer to Workshop Manual \(WSM\), Section 307\-01. Disassemble the transmission only far enough to access the SOWC. Refer to WSM, Section 307\-01 \> Overhaul and perform Steps 24\-65. The transmission range \(TR\) sensor does not have to be removed. Remove the SOWC assembly, disassemble the A\-clutch and discard the SOWC. Refer to WSM, Section 307\-01 \> Overhaul and perform Steps 164\-170. Assemble the new SOWC with the A\-clutch components. Refer to WSM, Section 307\-01 \> Overhaul and perform Steps 173\-179. The A\-clutch seals can be reused unless damaged. Install the new SOWC and reverse the procedure to reassemble the transmission. Overhaul the main control valve body. Refer to WSM, Section 307\-01 \> Overhaul \> Main Control Valve Body. Replace t
- [TSB 25\-2621](/bulletins/11028830.md), 2026-02-17, Service bulletin: STRUCTURE:BODY; POWER TRAIN; UNKNOWN OR OTHER; ELECTRICAL SYSTEM. Some vehicles listed in the Model statement above may exhibit a no crank/no start condition where the customer cannot start their vehicle. The vehicle may also exhibit a "No Key Detected" message displayed on the instrument panel cluster \(IPC\), and no key fob works in the back up slot. The remote keyless entry \(RKE\) functionality will work to lock/unlock the vehicle.
- [25B33](/bulletins/11023853.md), 2025-10-03, Other: ENGINE. Certain 2023\-2025 Model Year Escape and Corsair, 2024\-2025 Nautilus, 2025 Bronco Sport and Maverick Vehicles Originally Equipped with an Engine Block Heater System Block Heater Element Installation
- [TSB 25\-2416](/bulletins/11022409.md), 2025-09-03, Service bulletin: POWER TRAIN; ELECTRICAL SYSTEM. Some of the vehicles listed in the Model statement above may exhibit an illuminated malfunction indicator lamp \(MIL\) with diagnostic trouble code \(DTC\) P052B stored in the powertrain control module \(PCM\). This may be due to the software in the PCM.
- [TSB 25\-2365](/bulletins/11021710.md), 2025-08-07, Service bulletin: POWER TRAIN; ELECTRICAL SYSTEM. Some of the vehicles listed in the Model statement above may exhibit an illuminated malfunction indicator lamp \(MIL\) with diagnostic trouble code \(DTC\) P2450 stored in the powertrain control module \(PCM\). This may be due to the software level of the PCM.
- [PT\-24.10.0 Nautilus](/bulletins/11021530.md), 2025-08-06, Over\-the\-air update: ELECTRICAL SYSTEM; POWER TRAIN; SERVICE BRAKES. Priority Update \- Powertrain Powertrain Control Module PT\-24.10.0 1 Powertrain Software Enhancements We have updated your vehicle's software to prevent a false warning on your instrument panel which could lead to a reduction in regenerative braking.
- [SSM 53971](/bulletins/11020041.md), 2025-07-02, Service bulletin: ENGINE; POWER TRAIN. Some 2023\-2025 Escape vehicles equipped with a 1.5L/2.0L EcoBoost engine, 2023\-2025 Corsair vehicles equipped with a 2.0L EcoBoost engine, 2024\-2025 Nautilus vehicles equipped with a 2.0L EcoBoost engine, 2024\-2025 Mustang vehicles with a 2.3L EcoBoost engine, and 2025 Bronco/Explorer/Ranger vehicles equipped with a 2.3L EcoBoost engine may exhibit an engine misfire condition with diagnostic trouble codes \(DTC\) P0301, P0302, P0303 and/or P0304 set in the powertrain control module \(PCM\). This may be due to the spark plugs and/or ignition coils. To correct the condition, refer to Workshop Manual \(WSM\), Section 303\-07 for normal diagnostics.

JSON: [/v1/bulletins/11029936](/v1/bulletins/11029936)

[Report an error on this page](https://github.com/wenmar-pro/wenmar-open/issues/new?template=data_correction.yml&title=Data%20correction%3A%20Service%20bulletin%20SSM%2054643&page=https%3A%2F%2Fopen.wenmarpro.com%2Fbulletins%2F11029936&vehicle=Service%20bulletin%20SSM%2054643)