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Service bulletin SSM 49446

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 id10186598
Published by NHTSA2021-02-04
Manufacturer's numberSSM 49446
Manufacturer's date2021-01-14
NHTSA componentPOWER TRAIN

NHTSA's summary

Some 2021 F-Super Duty vehicles equipped with a 6.2L or 7.3L engine, F-150 vehicles equipped with a 3.3L or 5.0L engine, and Explorer/Police Interceptor Utility vehicles equipped with a 3.3L engine may exhibit an illuminated malfunction indicator (MIL) with diagnostic trouble code (DTC) P0106 stored in the powertrain control module (PCM) while in transport mode, especially in higher altitudes. To correct the condition, clear the DTCs and deactivate transport mode. Refer to Workshop Manual (WSM), Section 419-10 > General Procedures. Before starting the engine in the procedure, cycle the ignition to OFF, cycle the ignition to ON, wait ten seconds, cycle the ignition to OFF, wait ten seconds, then start the engine. If the condition remains, refer to the Powertrain Control/Emissions Diagnosis (PC/ED) Manual for diagnostics.

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

P0106

Vehicles listed
FORD EXPLORER2021
FORD EXPLORER POLICE INTERCEPT2021 (the catalog's model; the bulletin names a series or trim of it)
FORD F-1502021
FORD F-250 SD2021 (the catalog's model; the bulletin names a series or trim of it)
FORD F-350 SD2021 (the catalog's model; the bulletin names a series or trim of it)
FORD F-450 SD2021 (the catalog's model; the bulletin names a series or trim of it)
FORD F-550 SD2021 (the catalog's model; the bulletin names a series or trim of it)

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

Recalls for the same vehicles and component
20263112026-06-24. Powertrain
26V4020002026-06-24. POWER TRAIN:AUTOMATIC TRANSMISSION
20251372025-03-14. Powertrain
20251352025-03-14. Powertrain
25V1690002025-03-14. POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE (TCM/PCM/TECM)
25V1660002025-03-14. POWER TRAIN:DRIVELINE:DRIVESHAFT
20237052023-12-22. Powertrain
23V8960002023-12-22. POWER TRAIN:AXLE HUBS
20235432023-10-06. Powertrain
23V6750002023-10-06. POWER TRAIN:DRIVELINE:DRIVESHAFT

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
SSM 552182026-10-06. Service bulletin. For 20202026 vehicles equipped with the 10R140 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.
TSB 26-2088 v22026-10-05. Service bulletin. This bulletin supersedes 24-2249. Reason for update: update the claim quantity of the torque converter nuts, part number and claim quantity of the front support assembly bolt washers, and part number change of the fluid pan from the Parts List. Reissued 01-Oct-2026 - Added LC3Z-7G091-B to the part list
TSB 26-23952026-09-01. Service bulletin. 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
SSM550592026-08-03. Service bulletin. 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.
TSB 26-22942026-07-13. Service bulletin. This bulletin supersedes 26-2066. Reason for update: To remove "(2024 only)" from the Issue statement to include 2021-2025 vehicles that may exhibit a clicking sound coming from the gear shift lever. Some of the vehicles listed in the Model statement above equipped with a console GSM may exhibit at least one of the following conditions: * Clicking sound coming from the gear shift lever after it is placed and kept in reverse, neutral or drive position. * Gear shift lever stuck in park * Gear shift lever will not shift into park * Gear shift lever will not shift out of gear * Gear shift lever will not stow/unstow * Gear shift lever will move past the park position * Loose gear shift lever arm at pivot * Illuminated powertrain malfunction (wrench) indicator with DTCs P0929:77, P0929:00, P0929:07 and/or P0929:9A stored in the GSM This may be due to the GSM. Note: If the gear shifter lever will not shift into park, the transmission will automatically shift into park when the return to park function is triggered.
TSB 26-23042026-07-06. Service bulletin. This bulletin supersedes 25-2383. Reason for update: to add 2023-2026 F-150 2.7L vehicles. Some of the vehicles listed in the Model Statement may exhibit a vibration/shudder felt during light throttle tip in at highway speeds (8,9,10 gear) with no diagnostic trouble codes (DTC) present. This may be due to various software parameters in the powertrain control module (PCM).
TSB 26-22872026-06-22. Service bulletin. This article supersedes 25-2302. Reason for update: update the labor time allowance for F-150 vehicles, update the Parts list to replace the part number W716979-S439 with W721084-S439, and add a note for LV fluids XT-10-QLVC and CXT-10-LV6 "Transfer Case Fluid". 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 tra
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.
SSM 548272026-05-19. Service bulletin. Some 2020-2026 Explorer/Police Interceptor Utility/Aviator vehicles may require replacement of the front drive halfshaft inner/outer CV joint boot for various reasons. If Workshop Manual (WSM), Section 205-04 > Diagnosis and Testing leads to CV joint boot replacement, L1MZ-3A331-G (Explorer/Police Interceptor Utility front inner/outer CV joint boot kit), L1MZ-3A331-H (Aviator front inner/outer CV joint boot kit), L1MZ-3A331-F (Explorer/Police Interceptor Utility front inner CV joint boot kit) and L1MZ-3A331-E (Aviator front inner CV joint boot kit) have been released for service. Refer to WSM, Section 205-04 for Removal and Installation procedures.
TSB 26-22382026-05-18. Service bulletin. This article supersedes TSB 26-2130 to update labor operation to reprogram the PCM and check EVAP system from actual time to fixed time, and add extra time to reprogram coordinated modules (if required). 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 in the PCM.