Service bulletin TSB 23-2120

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)
Type	Service bulletin
NHTSA id	10236573
Published by NHTSA	2023-05-23
Manufacturer's number	TSB 23-2120
Manufacturer's date	2023-05-16
NHTSA component	PARKING BRAKE; POWER TRAIN

NHTSA's summary

Some 2018-2021 Expedition/Navigator and 2020-2021 Explorer/Aviator vehicles equipped with a 10R80/10R80 MHT or 10R60 may exhibit a momentary transmission neutral-out condition while in drive. Vehicle may also have diagnostic trouble code (DTC) P07E6 and/or P07E4 stored in the powertrain control module (PCM) or transmission control module (TCM) and/or a possible audible noise. This may be due to a leak in the park valve circuit. To correct the condition, follow the Service Procedure to inspect the park system hardware for wear or damage and replace the valve body separator plate with an improved valve body separator plate.

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

Brakes, Transmission and driveline, Parking brake

Trouble codes named

P07E4, P07E6

Vehicles listed
FORD EXPEDITION	2018, 2019, 2020, 2021
FORD EXPLORER	2020, 2021
LINCOLN AVIATOR	2020, 2021
LINCOLN NAVIGATOR	2018, 2019, 2020, 2021

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

Recalls for the same vehicles and component
23V199000	2023-03-24. PARKING BRAKE:ELECTRICAL; POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE (TCM/PCM/TECM)
19V575000	2019-08-05. PARKING BRAKE; ELECTRICAL SYSTEM: INSTRUMENT CLUSTER/PANEL; POWER TRAIN:AUTOMATIC TRANSMISSION:GEAR POSITION INDICATION (PRNDL)

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
TSB 20-2291	2020-09-02. Service bulletin. This article supersedes TSB 20-2135 to correct the Service Procedure. Some 2020 Explorer/Aviator/Corsair vehicles built on or before 23-Jul-2020 may inadvertently activate the reverse braking assist system while backing up. This may be perceived as the system is too sensitive to surrounding objects. This may be due to the software in the image processing module B (IPMB). To correct the condition, follow the Service Procedure to reprogram the IPMB, as well as the accessory protocol interface module (APIM) to allow the vehicle to remember the last setting of reverse brake assist when the vehicle is restarted.