# Service bulletin SSM 51764

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: 10238468
- Published by NHTSA: 2023\-07\-03
- Manufacturer's number: SSM 51764
- Manufacturer's date: 2023\-07\-03
- NHTSA component: POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE \(TCM/PCM/TECM\); ENGINE AND ENGINE COOLING

## NHTSA's summary

Some 2020\-2023 Explorer/Aviator vehicles equipped with a 3.0L EcoBoost may exhibit an illuminated malfunction indicator lamp \(MIL\) and low oil pressure warning in the instrument panel cluster \(IPC\), with diagnostic trouble codes \(DTC\) P0521 and/or P0524 in the powertrain control module \(PCM\). This condition may be caused by an internal oil pressure leak. If pinpoint test E in the Workshop Manual \(WSM\) Section 303\-01B directs you to the replacement of the oil pump, upon reassembly inspect that the main oil gallery tube \(6718\) is assembled and aligned properly on the back of the engine front cover. The engine oil gallery seal \(00815\) must be replaced any time the front cover is removed \(per WSM Section 303\-01B\). The WSM front cover removal and installation procedure is in the process of being updated.

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2023/MC-10238468-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2023/MC-10238468-9999.pdf)

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

## Components

Engine, Transmission and driveline, Automatic transmission, Transmission control module

## Trouble codes named

P0521, P0524

## Vehicles listed

- 2020 to 2023 FORD EXPLORER
- 2020 to 2023 LINCOLN NAVIGATOR

## Recalls for the same vehicles and component

- [26V402000](/recalls/nhtsa/26V402000.md), 2026-06-24: POWER TRAIN:AUTOMATIC TRANSMISSION
- [23V199000](/recalls/nhtsa/23V199000.md), 2023-03-24: PARKING BRAKE:ELECTRICAL; POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE \(TCM/PCM/TECM\)
- [23V070000](/recalls/nhtsa/23V070000.md), 2023-02-10: POWER TRAIN:AUTOMATIC TRANSMISSION
- [23V069000](/recalls/nhtsa/23V069000.md), 2023-02-10: POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE \(TCM/PCM/TECM\)
- [19V575000](/recalls/nhtsa/19V575000.md), 2019-08-05: PARKING BRAKE; ELECTRICAL SYSTEM: INSTRUMENT CLUSTER/PANEL; POWER TRAIN:AUTOMATIC TRANSMISSION:GEAR POSITION INDICATION \(PRNDL\)

## Other bulletins for the same vehicles and component

- [SSM 52244](/bulletins/10250306.md), 2024-02-14, Service bulletin: ENGINE AND ENGINE COOLING; POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE \(TCM/PCM/TECM\). Some 2021\-2023 F\-150 vehicles equipped with a 3.5L PowerBoost hybrid engine, 2020\-2023 Explorer vehicles equipped with a 3.3L hybrid engine and 2020\-2023 Aviator vehicles equipped with a 3.0L hybrid engine may exhibit a malfunction indicator lamp \(MIL\) with diagnostic trouble code \(DTC\) P0A1E stored in the powertrain control module \(PCM\) and auto start/stop disabled. This may be due to a loose wiring connection to the belt integrated starter generator \(BISG\). The Workshop Manual \(WSM\) has recently been updated to provide new direction for DTC P0A1E. Refer to the WSM, Section 303\-06 Starting System, Diagnosis and Testing, Starting System for applicable diagnosis.
- [SSM 52133](/bulletins/10247525.md), 2023-12-19, Service bulletin: ELECTRICAL SYSTEM:SOFTWARE; POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE \(TCM/PCM/TECM\). Some 2022\-2023 Expedition/Navigator vehicles equipped with a 1 speed transfer case may exhibit a concern where the 4x4 setting reverts to 2H after a key cycle. This may be due to the transfer case control module \(TCCM\) software. To correct the condition, reprogram the TCCM using the latest version of the Ford Diagnosis and Repair System \(FDRS\). For claiming, use causal part 7E453 and applicable labor operations in Section 10 of the Service Labor Time Standards \(SLTS\) Manual.
- [TSB 23\-2350](/bulletins/10245418.md), 2023-11-22, Service bulletin: POWER TRAIN; POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE \(TCM/PCM/TECM\); POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE:SOFTWARE. Some 2017\-2020 F\-150, 2018\-2021 Expedition/Navigator/Mustang, 2019\-2023 Ranger vehicles equipped with a 10R80 transmission may exhibit a harsh/delayed engagement and/or harsh/delayed shift, an illuminated malfunction indicator lamp \(MIL\) with diagnostic trouble codes This may be due to the software in the powertrain control module \(PCM\) or transmission control module \(TCM\), the transmission solenoid ID strategy, sticking valves in the main control valve body and/or axial movement of the CDF clutch cylinder \(7H351\) sleeve. To correct the condition, follow the Service Procedure to identify and correct the condition.
- [SSM 51984](/bulletins/10244833.md), 2023-11-03, Service bulletin: POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE \(TCM/PCM/TECM\); ENGINE AND ENGINE COOLING. Some 2022\-2023 Explorer vehicles with 2.3L engine built on or before 20\-Jul\-2023 may exhibit an intermittent malfunction indicator light \(MIL\) with diagnostic trouble code \(DTC\) P1026 and/or P1299 present in the powertrain control module \(PCM\) and an engine over\-temperature message displayed on the instrument panel cluster \(IPC\) after a cold engine start. The vehicle will also exhibit reduced performance when it enters fail safe cooling open loop mode. If the engine is not overheating, clear the DTCs to reset the fail safe cooling open loop mode. Start and idle the engine while viewing coolant flow at the top inner \(engine side\) degas bottle hose port through the semitransparent top. If there is no coolant flow, replace the L1MZ\-8A365\-AAD engine\-to\-degas bottle hose. If if there is any coolant flow, return to Workshop Manual \(WSM\), Section 303\-03A diagnostics.
- [SSM 51827](/bulletins/10240580.md), 2023-08-14, Service bulletin: ELECTRICAL SYSTEM:IGNITION; UNKNOWN OR OTHER; POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE \(TCM/PCM/TECM\). Some 2022\-2023 F\-150 and 2023 Expedition/Navigator vehicles built on or after 01\-Oct\-2022 equipped with a 3.5L GTDI engine may exhibit reduced engine power on startup and an illuminated powertrain malfunction \(wrench\) indicator with diagnostic trouble code \(DTC\) P2101 stored in the powertrain control module \(PCM\). This condition does not affect vehicle durability and no additional diagnosis or service is required for this condition at this time. Inform customers they can remove this condition and continue to drive the vehicle by turning off the vehicle and leaving the vehicle in Key OFF, Engine OFF for at least 30 seconds, then restarting the engine. Engineering is working on a solution that is expected in October 2023. Monitor OASIS for additional information and schedule service appointments once the repair becomes available.
- [SSM 51756](/bulletins/10238447.md), 2023-07-03, Service bulletin: ENGINE AND ENGINE COOLING; POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE \(TCM/PCM/TECM\). Some 2022\-2023 Explorer vehicles equipped with a 2.3L engine may exhibit an intermittent malfunction indicator light \(MIL\) with diagnostic trouble code \(DTC\) P1026 and/or P1299 present in the powertrain control module \(PCM\) and an engine over\-temperature message displayed on the instrument panel cluster \(IPC\) after a cold engine start. The vehicle will also exhibit reduced performance when it enters fail safe cooling open loop mode. If the engine is not overheating, clear the DTCs to reset the fail safe cooling open loop mode. Start and idle the engine while viewing coolant flow at the top inner \(engine side\) degas bottle hose port through the semitransparent top. If there is no coolant flow, replace the L1MZ\-8A365\-AAD engine\-to\-degas bottle hose. If if there is any coolant flow, return to Workshop Manual \(WSM\), Section 303\-03A diagnostics.
- [TSB 23\-2176](/bulletins/10237785.md), 2023-06-13, Service bulletin: POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE:SOFTWARE; POWER TRAIN; UNKNOWN OR OTHER. Some 2020\-2022 Explorer vehicles equipped with 2.3L engine and 10R60 automatic transmission may exhibit a delayed reverse engagement. This may be due to the software in the powertrain control module \(PCM\). To correct the condition, follow the Service Procedure to reprogram the PCM.
- [SSM 51032](/bulletins/10218605.md), 2022-08-22, Service bulletin: POWER TRAIN:AUTOMATIC TRANSMISSION; ENGINE AND ENGINE COOLING. Some 2020\-2022 Explorer/Aviator vehicles may exhibit automatic transmission fluid \(ATF\) contamination in the engine cooling system due to the transmission cooler. If the cooling system becomes contaminated with ATF, the system must be flushed clear of the contamination after the source of the contamination has been repaired. It is generally not necessary to replace the following components due to ATF contamination in the cooling system: radiator, heater core, de\-gas bottle, water pump, auxiliary water pump, coolant control valves, temperature sensors, thermostat, turbocharger, heat exchangers, tubes, gaskets/O\-rings/seals \(unless removed\), or rubber coolant hoses \(unless swollen\).
- [SSM 50885](/bulletins/10214841.md), 2022-06-30, Service bulletin: POWER TRAIN:AUTOMATIC TRANSMISSION. 2020\-2022 Explorer/Aviator and 2021\-2022 F\-150 hybrid vehicles equipped with a 10R80 MHT require the Transmission Strategy Download application in the Ford Diagnosis and Repair System \(FDRS\) to be run after certain transmission or module repairs. The Transmission Strategy Download routine is failing in FDRS levels 32.5.3 and 32.5.4. The FDRS development team is working to resolve this in a future release of FDRS. In the meantime, uninstall FDRS from the computer using the select all function to remove all data and recordings. Reinstall the older FDRS version 31.6.5 using this url \- http://www.fordservicecontent.com/Ford\_Content/IDS/FDRS/FDRS\_31.6.5.exe Once 31.6.5 is installed, download and run the Transmission Strategy Download application.
- [TSB 22\-2137](/bulletins/10214752.md), 2022-06-27, Service bulletin: ELECTRICAL SYSTEM; POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE \(TCM/PCM/TECM\). Some 2018\-2020 F\-150 vehicles equipped with a 2.7L EcoBoost and 2020\-2021 Expedition/Navigator may exhibit an illuminated malfunction indicator lamp \(MIL\) with diagnostic trouble codes \(DTCs\) P0420 and/or P0430 stored in the powertrain control module \(PCM\). This may be due to high sulfur content in the fuel. To correct the condition, follow the Service Procedure to de\-sulfate the catalytic convertors.

JSON: [/v1/bulletins/10238468](/v1/bulletins/10238468)

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