WenmarOpen by Wenmar Pro

Service bulletin TSB 26-2291

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.

The communication, as NHTSA indexes it (as of 2026-10-19)
TypeService bulletin
NHTSA id11034015
Published by NHTSA2026-06-22
Manufacturer's numberTSB 26-2291
Manufacturer's date2026-06-19
NHTSA componentUNKNOWN OR OTHER; POWER TRAIN
Manufacturer's systemAmbient Air Temp Sensor

NHTSA's summary

This bulletin supersedes 26-2006. Reason for update: update the Parts list to correct the ambient air temperature service part number. Some vehicles listed in the model statement above may require the replacement of the ambient air temperature sensor for various concerns. DTCs P0071, P0072, and/or P0073 may be present in the powertrain control module (PCM).

The document

The document is the manufacturer's. This site does not hold it. NHTSA files a document at one of these two addresses; we have not asked NHTSA which.

Components

Transmission and driveline

Trouble codes named

P0071, P0072, P0073

Vehicles listed
FORD BRONCO2021, 2022, 2023, 2024, 2025

Listing a model year does not mean every vehicle of it is concerned: the document says which.

Recalls for the same vehicles and component
20261882026-04-15. Powertrain
26V2360002026-04-14. POWER TRAIN:AUTOMATIC TRANSMISSION
25V1640002025-03-14. POWER TRAIN:AUTOMATIC TRANSMISSION:FLUID/LUBRICANT:VALVES/VALVE BODY
23V5460002023-08-03. POWER TRAIN:AUTOMATIC TRANSMISSION:INTERNAL:PARK PAWL
20230572023-02-13. Powertrain
23V0700002023-02-10. POWER TRAIN:AUTOMATIC TRANSMISSION

A recall listed here may apply to some of the same vehicles. Only the manufacturer can say whether it applies to one vehicle.

Other bulletins for the same vehicles and component
PCM-26.10.3 Bronco2026-09-21. Over-the-air update. 25S75 Recall remedy -Powertrain Control Module update to introduce logic to prevent low pressure fuel pump binding and maintain fuel flow to the engine.
SSM 550732026-08-11. Service bulletin. Some 2021-2026 Bronco vehicles may require the removal and installation of the transfer case for various reasons. Installation requires Loctite® 243 adhesive applied to the mounting bolt threads in the transmission. Make sure that the mating faces are clean and dry. Tightening the mounting bolts also requires an updated two-stage tightening sequence. Workshop Manual (WSM), Sections 307-07C/D and 308-07C/D Installation > Transfer Case have been updated to reflect this change.
SSM 550442026-07-27. Service bulletin. Some 2025-2026 Bronco/Ranger vehicles may exhibit an illuminated powertrain malfunction (wrench) indicator with diagnostic trouble codes (DTC) P2122, P2123, P2127, P2128, and/or P2138 stored in the powertrain control module (PCM). The vehicle may or may not exhibit a perceived lack of power intermittently. This may be due to an issue with the following connectors associated with the accelerator pedal position (APP) sensor circuits: -C115B -C175B -C2040 Replacement of the accelerator pedal may not resolve this concern. Perform a wiggle test of the connectors while the engine is at normal operating temperature. Perform a visual inspection of the connectors as well as a terminal fit test using the appropriately sized flex probe. Repair as necessary. Refer to Wiring Diagram Cell 005. If no concerns are found, refer to Workshop Manual (WSM), Section 310-02 for normal diagnostics.
SSM 549022026-06-09. Service bulletin. For 20202026 vehicles equipped with the 10R60 transmission, a new Transmission Clutch Circuit Leak Test has been introduced in the Ford Diagnosis and Repair System (FDRS). This test utilizes the pressure and vacuum transducer (PVT) when available. Workshop Manual (WSM) updates related to this diagnostic procedure are planned for release in Q4 2026. The new test improves the accuracy of detecting leaks within transmission fluid circuits and replaces the previous air check method. The previous air check procedure has been shown to produce a high rate of false positives, which may lead to unnecessary repairs when no actual leak is present. Accordingly, the air check procedure is not to be used for diagnosing internal transmission hydraulic leaks or as justification for transmission replacement.
26B082026-06-05. Other. Certain 2025 Bronco/Ranger and 2025-2026 Explorer/Aviator 4-wheel drive vehicles equipped with a 10R60 transmission. Transmission Replacement
26B042026-06-05. Other. Certain 2025 Model Year Bronco and Ranger Vehicles All Wheel Drive Module Replacement
TSB 26-22102026-06-05. Service bulletin. Some of the vehicles listed in the Model statement above may exhibit all of the following conditions: * Engine misfire condition * Illuminated malfunction indicator lamp (MIL) with diagnostic trouble codes (DTC) P0301, P0302, P0303, and/or P0304 stored in the powertrain control module (PCM)
SSM 548182026-05-18. Service bulletin. Some 2021-2024 Bronco vehicles equipped with a manual transmission may experience a rotational scraping noise while the transmission is in neutral, 1st and/or 2nd gear with the clutch pedal released. The noise may be more noticeable in ambient temps below 10°C (50°F) and after a cold soak. This noise may also diminish as the transmission warms up. This may be due to the 5th and 6th gear synchronizer rings. The 5th and 6th gear synchronizer rings are now only available in the 6th/5th gear synchronizer assembly (service part number MU7Z-7124-Q). To correct the condition, replace the 6th/5th gear synchronizer. Remove the transmission from the vehicle. Refer to Workshop Manual (WSM), Section 308-03 > Removal. Disassemble the transmission. Refer to WSM, Section 308-03 > Disassembly. Disassemble the input shaft to gain access to the 6th/5th gear synchronizer. Refer to WSM, Section 308-03 > Disassembly and Assembly of Subassemblies > Input Shaft. Replace the 6th/5th gear synchronizer and assemble the input shaft. Assemble the transmission. Refer to WSM, Section 308-03 > Assembly. Install the transmission.
HVAC-22.AA.AC Bronco2026-05-15. Over-the-air update. Quality improvements include: - Optimizes cabin ventilation strategy at high speeds
PCM-26.7.0 Bronco2026-05-01. Over-the-air update. Quality improvements include: -Powertrain Control Module calibration update to address a potential false warning light