# Service bulletin TSB 21\-2297

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: 10201624
- Published by NHTSA: 2021\-09\-30
- Manufacturer's number: TSB 21\-2297
- Manufacturer's date: 2021\-09\-13
- NHTSA component: AIR BAGS:SENSOR:SIDE IMPACT; ELECTRICAL SYSTEM

## NHTSA's summary

Some 2020\-2021 Explorer/Aviator and 2021 Bronco vehicles may exhibit an illuminated airbag warning indicator with diagnostic trouble code \(DTC\) B1404:13 and/or B1407:13. This may be due to contamination and relative movement in the connection between the wiring harness and the side airbag. To correct the condition, follow the Service Procedure steps to replace the affected connector with a service pigtail and the affected side airbag.

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2021/MC-10201624-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2021/MC-10201624-9999.pdf)

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

## Components

Air bags, Electrical system

## Trouble codes named

B1404, B1407

## Vehicles listed

- 2021 FORD BRONCO
- 2020 to 2021 FORD EXPLORER
- 2020 to 2021 LINCOLN AVIATOR

## Recalls for the same vehicles and component

- [2026356](/recalls/tc/2026356.md), 2026-07-20: Electrical
- [26V468000](/recalls/nhtsa/26V468000.md), 2026-07-20: ENGINE; ELECTRICAL SYSTEM:WIRING:FRONT UNDERHOOD
- [2026005](/recalls/tc/2026005.md), 2026-01-09: Electrical
- [2025554](/recalls/tc/2025554.md), 2025-10-10: Electrical
- [25V349000](/recalls/nhtsa/25V349000.md), 2025-05-23: ELECTRICAL SYSTEM:PROPULSION SYSTEM:TRACTION BATTERY
- [23V626000](/recalls/nhtsa/23V626000.md), 2023-09-08: ELECTRICAL SYSTEM:PROPULSION SYSTEM:TRACTION BATTERY
- [2022721](/recalls/tc/2022721.md), 2022-12-15: Airbag
- [22V928000](/recalls/nhtsa/22V928000.md), 2022-12-14: AIR BAGS:SENSOR:SIDE IMPACT
- [2021609](/recalls/tc/2021609.md), 2021-10-01: Airbag
- [21V770000](/recalls/nhtsa/21V770000.md), 2021-10-01: AIR BAGS:FRONTAL

## Other bulletins for the same vehicles and component

- [SSM 55240](/bulletins/11038445.md), 2026-10-13, Service bulletin: ELECTRICAL SYSTEM; UNKNOWN OR OTHER; SERVICE BRAKES. Some 2021\-2024 Bronco vehicles may exhibit an illuminated red brake warning indicator with diagnostic trouble code \(DTC\) C0049:01 stored in the anti\-lock brake system \(ABS\) module. This may be due to pin fitment at the brake fluid level sensor connector. To resolve this concern, replace the brake fluid reservoir and replace the brake fluid level sensor electrical connector C1052 with service pigtail wiring kit 3U2Z\-14S411\-BXAB. For claiming, use causal part 2L210 and labor operations 2140A and 2219D45WR.
- [TSB 26\-2325](/bulletins/11037978.md), 2026-10-05, Service bulletin: EXTERIOR LIGHTING; ELECTRICAL SYSTEM; UNKNOWN OR OTHER. Some of the vehicles listed in the Model statement above may exhibit a front courtesy lamp that is inoperative. This may be due to a concern with the front courtesy lamp light module.
- [TSB 26\-2380](/bulletins/11037537.md), 2026-09-29, Service bulletin: SUSPENSION; ELECTRICAL SYSTEM; STRUCTURE:BODY; UNKNOWN OR OTHER. This article supersedes TSB 25\-2575 to update the Parts list to add the applicable body wiring harnesses and underbody shield bolts. Some vehicles listed in the Model statement above may exhibit a "Sta\-bar Disconnect Service Required" message in the instrument panel cluster \(IPC\) with any of the following diagnostic trouble codes \(DTCs\) stored in the chassis control module \(CHCM\): C103A, C1A99, C1B03, C1B07, C1B14 and/or B1A67. This may be due to water intrusion in the stabilizer bar wiring harness connector.
- [PCM\-26.2.11.4 Bronco](/bulletins/11037309.md), 2026-09-14, Over\-the\-air update: FUEL/PROPULSION SYSTEM; ELECTRICAL SYSTEM; UNKNOWN OR OTHER. 25S75 Recall remedy \-Powertrain Control Module update to introduce logic to prevent low pressure fuel pump binding and maintain fuel flow to the engine.
- [PCM\-26.2.11.3 Bronco](/bulletins/11037308.md), 2026-09-14, Over\-the\-air update: ELECTRICAL SYSTEM; UNKNOWN OR OTHER; FUEL/PROPULSION SYSTEM. 25S75 Recall remedy \-Powertrain Control Module update to introduce logic to prevent low pressure fuel pump binding and maintain fuel flow to the engine.
- [PCM\-26.11.5 Bronco](/bulletins/11037307.md), 2026-09-14, Over\-the\-air update: UNKNOWN OR OTHER; FUEL/PROPULSION SYSTEM; ELECTRICAL SYSTEM. 25S75 Recall remedy \-Powertrain Control Module update to introduce logic to prevent low pressure fuel pump binding and maintain fuel flow to the engine.
- [TSB 26\-2395](/bulletins/11036595.md), 2026-09-01, Service bulletin: POWER TRAIN; UNKNOWN OR OTHER; ELECTRICAL SYSTEM. This article supersedes 26\-2287. Reason for update: update the labor operation numbers to add MT to operations C, F, G, H, J, K, L and M, and correct the part number LIMZ\-4A015\-B to L1MZ\-4A015\-B. Some of the vehicles listed in the Model statement above may exhibit at least one of the following conditions: Harsh engagement Delayed engagement Harsh shift Delayed shift Illuminated malfunction indicator lamp \(MIL\) with diagnostic trouble codes \(DTC\)s 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 axial movement of the CDF clutch cylinder sleeve causing hydraulic circuit leaks. NOTE: If internal transmission service is required to address a concern detected with the CDF clutch cylinder following this article, technicians should carefully inspect and replace other transmission components and flush transmission fluid cooler only as ne
- [SSM 55069](/bulletins/11036103.md), 2026-08-11, Service bulletin: VISIBILITY/WIPER; ELECTRICAL SYSTEM; STRUCTURE:BODY. Some 2020\-2025 Explorer vehicles equipped with a power roof opening panel may exhibit a sunshield with localized bunching or binding/inoperative. This may be due to a broken or missing sunshield fabric retainer/clip. A revised sunshield clip \(LJ6Z\-5452118\-B\) is now available to address this condition. It is not necessary to replace the entire sunshield assembly if the clip\(s\) are broken or missing. Refer to Workshop Manual \(WSM\), Section 501\-17 Roof Opening Panel \> General Procedures \> Inspection and Replacement of the Roof Opening Panel Shield Clip.
- [SSM55059](/bulletins/11035556.md), 2026-08-03, Service bulletin: POWER TRAIN; ELECTRICAL SYSTEM; UNKNOWN OR OTHER; FUEL/PROPULSION SYSTEM. Some 2021\-2023 F\-150 vehicles equipped with a 3.5L PowerBoost engine, 2020\-2026 Explorer vehicles equipped with a 3.3L hybrid engine, and 2020\-2023 Lincoln Aviator vehicles equipped with a 3.0L EcoBoost hybrid engine may exhibit an illuminated powertrain malfunction \(wrench\) indicator with diagnostic trouble code \(DTC\) P0A1E stored in the powertrain control module \(PCM\). The vehicle may be unable to enter electric\-only drive modes as expected during normal drive cycles. This may be due to the belt integrated starter generator \(BISG\). For vehicles with this condition, follow the necessary Pinpoint Test in Workshop Manual \(WSM\), Section 303\-06 for DTC P0A1E and repair the vehicle as directed. Note that previous replacement of the BISG does not negate the need for subsequent BISG replacements if directed to do so by the appropriate Pinpoint Test diagnostics. Engineering is investigating this BISG quality concern. Monitor PTS for updates regarding this investigation.
- [26E04](/bulletins/11035465.md), 2026-08-03, Emissions: UNKNOWN OR OTHER; ELECTRICAL SYSTEM. NEW VEHICLE DELIVERY HOLD \- Emissions Recall 26E04 Certain 2021\-2025 Model Year F\-150, Maverick, Mustang, Ranger, Expedition, Bronco Sport, Explorer, Bronco, Navigator, and Aviator Vehicles Powertrain Control Module Software Update

JSON: [/v1/bulletins/10201624](/v1/bulletins/10201624)

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