# Service bulletin TSB 21\-2434

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: 10205717
- Published by NHTSA: 2022\-01\-01
- Manufacturer's number: TSB 21\-2434
- Manufacturer's date: 2021\-12\-24
- NHTSA component: POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE \(TCM/PCM/TECM\)

## NHTSA's summary

Some 2020\-2022 Explorer/Aviator/Police Interceptor Utility vehicles and 2021 F\-150 vehicles equipped with a 10R80 MHT automatic transmission may exhibit a harsh/delayed engagement and/or a harsh/delayed shift with or without an illuminated malfunction indicator lamp \(MIL\) or diagnostic trouble codes \(DTC\) P0729, P0731, P0732, P0733, P0734, P0735, P0736, P076F, P07D9, P07F6, P07F7, P2700, P2701, P2702, P2703, P2704 and/or P2705 stored in the powertrain control module \(PCM\). This may be due to sticking valves in the main control valve body. To correct the condition, follow the Service Procedure steps to perform the PCM \- Transmission Accelerated Main Control Break In routine for the appropriate clutch\(s\) and/or overhaul the main control valve body.

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2021/MC-10205717-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2021/MC-10205717-9999.pdf)

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

## Components

Transmission and driveline, Automatic transmission, Transmission control module

## Trouble codes named

P0729, P0731, P0732, P0733, P0734, P0735, P0736, P076F, P07D9, P07F6, P07F7, P2700, P2701, P2702, P2703, P2704, P2705

## Vehicles listed

- 2020 to 2022 FORD EXPLORER
- 2021 FORD F\-150
- 2020 to 2022 LINCOLN AVIATOR

## Recalls for the same vehicles and component

- [26V402000](/recalls/nhtsa/26V402000.md), 2026-06-24: POWER TRAIN:AUTOMATIC TRANSMISSION
- [25V169000](/recalls/nhtsa/25V169000.md), 2025-03-14: POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE \(TCM/PCM/TECM\)
- [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 \(TCM/PCM/TECM\)
- [22V188000](/recalls/nhtsa/22V188000.md), 2022-03-25: 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

- [TSB 24\-2097](/bulletins/10252670.md), 2024-04-04, Service bulletin: POWER TRAIN:MANUAL TRANSMISSION:CONTROL MODULE \(TCM/PCM/TECM\); POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE \(TCM/PCM/TECM\); ELECTRICAL SYSTEM. Some 2021\-2022 F\-150 non\-Lightning vehicles may exhibit an illuminated powertrain malfunction \(wrench\) indicator and Service Vehicle Soon message in the instrument panel cluster \(IPC\) with diagnostic trouble code \(DTC\) U031D in the powertrain control module \(PCM\) and no other drivability concerns. This may be due to the configuration of the PCM.
- [SSM 52371](/bulletins/10252635.md), 2024-04-04, Service bulletin: POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE \(TCM/PCM/TECM\); POWER TRAIN:MANUAL TRANSMISSION:CONTROL MODULE \(TCM/PCM/TECM\). Some 2021\-2022 F\-150 non\-Lightning vehicles may exhibit an illuminated powertrain malfunction \(wrench\) indicator and Service Vehicle Soon message in the instrument panel cluster \(IPC\) with diagnostic trouble code \(DTC\) U031D in the powertrain control module \(PCM\) and no other drivability concerns. This may be due to the configuration of the PCM. To correct this condition, run the PCM \- Disable Pro Trailer Hitch Assist application using the latest software level of the Ford Diagnosis and Repair System \(FDRS\) scan tool.
- [SSM 52349](/bulletins/10252621.md), 2024-04-04, Service bulletin: POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE \(TCM/PCM/TECM\); POWER TRAIN:MANUAL TRANSMISSION:CONTROL MODULE \(TCM/PCM/TECM\). Some 2021\-2023 F\-150 vehicles may exhibit DTC C0604:00 stored in the powertrain control module \(PCM\) and may have an Active Air Dam System Fault See Manual message displayed in the instrument panel cluster \(IPC\). To correct this condition, clear and retest for the DTC C0604:00. If DTC C0604:00 returns, refer to Workshop Manual \(WSM\) Section 501\-19 Bumpers, Diagnosis and Testing for additional diagnosis.
- [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.
- [OTA23PU0630YAW](/bulletins/10249823.md), 2024-02-07, Service bulletin: ELECTRICAL SYSTEM; POWER TRAIN; POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE \(TCM/PCM/TECM\). Software Update 23\-PU0630\-YAW\-RT for 2021 MY F\-150 vehicles is now available. Quality Improvements include: \-Correct the Generator voltage desired \(GENVDSD\) parameter identification \(PID\) missing from the powertrain control module \(PCM\) PID list in the Ford Diagnosis And Repair System \(FDRS\) scan tool. Refer TSB 23\-2154 \- Robustness action in operation of vehicle to detect low\-state\-of\-charge battery and prevent potential engine stall, as well as provide improved warning to customers when low\-state\-of\-charge conditions exist. \- Robustness action to prevent potential line pressure drift DTC P084B from setting. \- Eliminate potential ABS Yaw Rate Calibration issue. \- Robustness action to alleviate the Nuisance SSN \(Stop Safely Now\) mesage from setting and vehicle should operate as expected in the next Key Start event \- Eliminates potential Emergency Parking Brake activation when wire harness experience a short.
- [TSB 23\-2429](/bulletins/10248370.md), 2024-01-05, Service bulletin: POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE \(TCM/PCM/TECM\); POWER TRAIN. This article supersedes TSB 23\-2363 to add 2021\-2022 vehicle model years, update the symptom and the causal part. Some 2021\-2023 F\-150 vehicles equipped with a 3.5L PowerBoost engine may exhibit an illuminated powertrain malfunction \(wrench\) indicator with diagnostic trouble code \(DTC\) P084B stored in the powertrain control module \(PCM\). This may be due to the software level of the PCM. To correct this condition, perform the Service Procedure below to reprogram the PCM to the latest software level via the Ford Diagnosis and Repair System \(FDRS\).
- [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 51764](/bulletins/10238468.md), 2023-07-03, Service bulletin: POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE \(TCM/PCM/TECM\); ENGINE AND ENGINE COOLING. 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.
- [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.

JSON: [/v1/bulletins/10205717](/v1/bulletins/10205717)

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