# Service bulletin TSB 21\-2081

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: 10189788
- Published by NHTSA: 2021\-04\-03
- Manufacturer's number: TSB 21\-2081
- Manufacturer's date: 2021\-03\-19
- NHTSA component: ELECTRICAL SYSTEM; POWER TRAIN

## NHTSA's summary

Some 2019\-2021 Edge and 2019\-2020 Nautilus vehicles built on or before 11\-Mar\-2021 and equipped with a 8F35 transmission may exhibit a shudder/buck/jerk while driving up to 35 mph \(57 km/h\). This may be due to the software in the powertrain control module \(PCM\). To correct this condition, follow the Service Procedure steps to reprogram the PCM and the transmission solenoid strategy.

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2021/MC-10189788-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2021/MC-10189788-9999.pdf)

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

## Components

Electrical system, Transmission and driveline

## Vehicles listed

- 2019 to 2021 FORD EDGE
- 2019 to 2020 LINCOLN NAUTILUS

## Recalls for the same vehicles and component

- [26V372000](/recalls/nhtsa/26V372000.md), 2026-06-09: ELECTRICAL SYSTEM: INSTRUMENT CLUSTER/PANEL
- [2021011](/recalls/tc/2021011.md), 2021-01-18: Powertrain
- [21V011000](/recalls/nhtsa/21V011000.md), 2021-01-15: POWER TRAIN:DRIVELINE:DRIVESHAFT
- [20V550000](/recalls/nhtsa/20V550000.md), 2020-09-10: POWER TRAIN:AUTOMATIC TRANSMISSION
- [20V414000](/recalls/nhtsa/20V414000.md), 2020-07-17: SEATS:FRONT ASSEMBLY:POWER ADJUST; AIR BAGS; ELECTRICAL SYSTEM:WIRING:INTERIOR/UNDER DASH
- [19V076000](/recalls/nhtsa/19V076000.md), 2019-02-11: ELECTRICAL SYSTEM: INSTRUMENT CLUSTER/PANEL

## Other bulletins for the same vehicles and component

- [TSB 26\-2341 v2](/bulletins/11037661.md), 2026-10-01, Service bulletin: UNKNOWN OR OTHER; POWER TRAIN. This bulletin supersedes 26\-2171. Reasons for update: update the Parts list to add a note to clarify the application of the part numbers W520102\-S442 and 4S4Z\-3N324\-AA "FWD Only". Some of the vehicles listed in the Model statement above may exhibit all of the following conditions: Shudder condition, most noticeable at speeds below 60 mph \(100 km/h\) No relevant diagnostic trouble codes \(DTC\) present Traceable shudder event with IDS/FDRS reading \*\(Figure 1\)\* This condition may be perceived/felt as an engine misfire. This may be due to a concern with the output planetary assembly.
- [SSM 55031](/bulletins/11035269.md), 2026-07-28, Service bulletin: UNKNOWN OR OTHER; FUEL/PROPULSION SYSTEM; ELECTRICAL SYSTEM. Some 2021\-2026 Ford/Lincoln vehicles may exhibit various symptoms including but not limited to the auto start/stop system not operating as intended with a "Check Charging System" message in the instrument panel cluster \(IPC\) while the charging system is operating properly with no charging related diagnostic trouble codes \(DTC\) stored. This may be due to someone using an aftermarket programmer to change the body control module \(BCM\) configuration to disable the auto start/stop system or perform other unsupported programming modifications. To correct this condition on F\-150 and Bronco vehicles, download and run the Ford Diagnosis and Repair System \(FDRS\) application titled "BCM\-Charging System Configuration Correction". Running this application will determine if the BCM configuration was modified by the customer and if so, provide the option to return the configuration back to factory settings. For other vehicle models exhibiting concerns related to unsupported aftermarket BCM programming, submit a Technical Support Request \(TSR\) requesting support to revert the BCM configuration
- [SSM 55028](/bulletins/11035267.md), 2026-07-28, Service bulletin: ELECTRICAL SYSTEM; UNKNOWN OR OTHER. Some 2021\-2024 Ford and Lincoln vehicles may exhibit an "Updating SYNC" message on the vehicle center display screen after an over the air \(OTA\) update. The message can be cleared from the center display screen and SYNC can be used normally, but it will re\-appear at every subsequent ignition cycle. Inform customers that engineering is currently working on a software update solution for this condition to be delivered OTA expected in late Q3 2026. Software will update automatically if vehicle connectivity is enabled in the vehicles settings. Monitor Professional Technician System \(PTS\) for additional information.
- [TSB 26\-2341](/bulletins/11035231.md), 2026-07-27, Service bulletin: UNKNOWN OR OTHER; POWER TRAIN. This bulletin supersedes 26\-2171. Reasons for update: update the Parts list to add a note to clarify the application of the part numbers W520102\-S442 and 4S4Z\-3N324\-AA "FWD Only". Some of the vehicles listed in the Model statement above may exhibit all of the following conditions: Shudder condition, most noticeable at speeds below 60 mph \(100 km/h\) No relevant diagnostic trouble codes \(DTC\) present Traceable shudder event with IDS/FDRS reading \*\(Figure 1\)\* This condition may be perceived/felt as an engine misfire. This may be due to a concern with the output planetary assembly.
- [TSB 26\-2328](/bulletins/11035099.md), 2026-07-20, Service bulletin: POWER TRAIN; UNKNOWN OR OTHER. This bulletin supersedes 26\-2194. Reason for update: update the Parts list to correct a part description " Loctite 638", update the claim quantity for the drain/fill plug, update the claim quantity of the wheel hub bolts \(Corsair\) and limited the parts list for Edge/Nautilus to only the rear drive unit fluid. Some of the vehicles listed in the Model statement above may exhibit all of the following conditions: Shudder chatter condition, most noticeable at low speeds turning No relevant diagnostic trouble codes \(DTCs\) present This may be due to internal rear drive unit \(RDU\) fluid contamination.
- [TSB 26\-2297](/bulletins/11034134.md), 2026-06-29, Service bulletin: UNKNOWN OR OTHER; ELECTRICAL SYSTEM. Some of the vehicles listed in the model statement above equipped with SYNC4 may experience a blank center display screen or black center display after welcome animation. The rear\-view camera will still function when shifting the vehicle to reverse under these conditions.
- [ECG\-26.2.11.4.1 Edge](/bulletins/11033809.md), 2026-06-13, Over\-the\-air update: ELECTRICAL SYSTEM; UNKNOWN OR OTHER. Quality improvements include: \- Enhanced system performance, disk usage limits and memory monitoring
- [SYNC\-26.2.0.16.2 Edge](/bulletins/11031651.md), 2026-04-28, Over\-the\-air update: UNKNOWN OR OTHER; ELECTRICAL SYSTEM. 26S09 Recall Remedy \-Update to enable rearview camera image to display when in reverse after infotainment screen thermal shutdown
- [TSB 26\-2194](/bulletins/11031619.md), 2026-04-28, Service bulletin: POWER TRAIN. This bulletin supersedes 25\-2627. Reason for update: To add a Step to reprogram the all\-wheel drive \(AWD\) module for Bronco Sport vehicles. Some of the vehicles listed in the Model statement above may exhibit all of the following conditions: Shudder chatter condition, most noticeable at low speeds turning No relevant diagnostic trouble codes \(DTCs\) present This may be due to internal rear drive unit \(RDU\) fluid contamination.
- [SSM 54720](/bulletins/11031263.md), 2026-04-10, Service bulletin: ELECTRICAL SYSTEM; LANE DEPARTURE: BLIND SPOT DETECTION. Various 2020\-2026 Ford and Lincoln vehicles equipped with blind spot information system \(BLIS\) may experience an inoperative blind spot monitoring with a "Blind Spot System Fault" message displayed in the instrument panel cluster \(IPC\). This may also be accompanied by diagnostic trouble codes \(DTCs\) B118C:11 and/or B118C:15 stored in the driver door module \(DDM\), and/or B118D:11 and/or B118D:15 stored in the passenger door module \(PDM\). This may be due to the wiring connector from the mirror to the BLIS module. If diagnostics lead to an internal mirror wiring harness fault, a new lower level BLIS light pigtail is now released for service. It is not necessary to replace the exterior mirror assembly. Use part number SC3Z\-14A411\-B to resolve the concern.

JSON: [/v1/bulletins/10189788](/v1/bulletins/10189788)

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