# Service bulletin TSB 20\-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.

- Type: Service bulletin
- NHTSA id: 10179156
- Published by NHTSA: 2020\-09\-02
- Manufacturer's number: TSB 20\-2291
- Manufacturer's date: 2020\-08\-31
- NHTSA component: PARKING BRAKE

## NHTSA's summary

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.

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2020/MC-10179156-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2020/MC-10179156-9999.pdf)

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

## Components

Brakes, Parking brake

## Vehicles listed

- 2020 FORD EXPLORER
- 2020 LINCOLN AVIATOR
- 2020 LINCOLN CORSAIR

## Recalls for the same vehicles and component

- [23V199000](/recalls/nhtsa/23V199000.md), 2023-03-24: PARKING BRAKE:ELECTRICAL; 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 23\-2120](/bulletins/10236573.md), 2023-05-23, Service bulletin: PARKING BRAKE; POWER TRAIN. 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.
- [SSM 51184](/bulletins/10226753.md), 2022-11-29, Service bulletin: PARKING BRAKE. Some 2020\-2022 Escape/Corsair vehicles built on or before 17\-May\-2022 and 2021\-2022 Bronco Sport vehicles built on or before 25\-Feb\-2022 may exhibit a hiss or rattle noise while driving. This may be due to an internal issue with the manual park release cable. If the noise is eliminated when the cable is disconnected from the transmission, install a new manual park release cable assembly LX6Z\-7D246\-T. Refer to the Workshop Manual \(WSM\), Section 307\-05 \> Automatic Transmission External Controls \> Removal and Installation.

JSON: [/v1/bulletins/10179156](/v1/bulletins/10179156)

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