# Service bulletin 21\-018\-22

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: 10214643
- Published by NHTSA: 2022\-06\-27
- Manufacturer's number: 21\-018\-22
- Manufacturer's date: 2022\-05\-28
- NHTSA component: POWER TRAIN; ELECTRICAL SYSTEM

## NHTSA's summary

Flash: Transmission Control Module \(TCM\) Updates This bulletin involves reprogramming the TCM with the latest available software. Customers may experience the following:Harsh downshifts \(3\-2 or 2\-1\) when stopping.

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2022/MC-10214643-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2022/MC-10214643-9999.pdf)

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

## Components

Electrical system, Transmission and driveline

## Vehicles listed

- 2021 DODGE DURANGO

## Other bulletins for the same vehicles and component

- [S2621000004](/bulletins/11038329.md), 2026-10-07, Service bulletin: POWER TRAIN. The Customer May Complain About a Popping Noise, Grinding Noise, or an Intermittent No Reverse or Forward Transmission Engagement. The Tech May Find Damaged and/or Worn Transmission Output Shaft Splines \(850RE Transmission Only\)
- [114738](/bulletins/11037594.md), 2026-09-30, Service bulletin: POWER TRAIN. TRANSMISSION KIT \- WITH TORQUE CONVERTER
- [114737](/bulletins/11037593.md), 2026-09-30, Service bulletin: POWER TRAIN. TRANSMISSION KIT \- WITH TORQUE CONVERTER
- [9100900](/bulletins/11037346.md), 2026-09-17, Service bulletin: ELECTRICAL SYSTEM; STRUCTURE:BODY. Passive Entry O/S Dr Handle Prior to replacing an inoperative passive entry door handle, perform Star Online S2623000040.
- [113803](/bulletins/11036166.md), 2026-08-13, Service bulletin: ENGINE; ELECTRICAL SYSTEM. HOSE AND TUBE \- HEATER SUPPLY AND RETURN
- [08\-294\-26](/bulletins/11035317.md), 2026-07-29, Service bulletin: ELECTRICAL SYSTEM. Telematics Box Module \(TBM\) Firmware Over The Air Customers must experience a Malfunction Indicator Lamp \(MIL\) illumination and the vehicle must SYMPTOM: exhibit/set the following Diagnostic Trouble Codes \(DTCs\): ● B22A9\-00 \- ECU Internal Performance. ● B1560\-13 \- Cellular Antenna 1\-Circuit Open. ● B1561\-13 \- Cellular Antenna 2\-Circuit Open. ● B1562\-12 \- GPS Antenna\-Circuit Short To Battery. Customers may also comment on the following: ● "Uconnect Box Requires Service" message in the display screen module.
- [08\-256\-26](/bulletins/11034896.md), 2026-07-08, Service bulletin: ELECTRICAL SYSTEM. Uconnect® Screen Turns Blank Or Black Customers may experience the following: SYMPTOM: ● The Uconnect® screen display goes blank/black at times.
- [S2623000041 REV.A](/bulletins/11034351.md), 2026-07-02, Service bulletin: STRUCTURE:BODY; ELECTRICAL SYSTEM. Power Liftgate Intermittently Inoperative. Will Not Open/ Close. Liftgate/Hatch Ajar Message Displayed. Rev A
- [S268A000014](/bulletins/11034346.md), 2026-07-02, Service bulletin: ELECTRICAL SYSTEM. Radio/ETM is Adding Approximately 27mA Draw to Vehicle When in Logistics Mode
- [S1623000028 Rev. K](/bulletins/11033975.md), 2026-06-18, Service bulletin: ELECTRICAL SYSTEM; STRUCTURE:BODY. Outside Power Fold Rearview Mirror Noise Or Loose At Pivot. Mirror Contacts Door Window Glass In The Folded Position.

JSON: [/v1/bulletins/10214643](/v1/bulletins/10214643)

[Report an error on this page](https://github.com/wenmar-pro/wenmar-open/issues/new?template=data_correction.yml&title=Data%20correction%3A%20Service%20bulletin%2021-018-22&page=https%3A%2F%2Fopen.wenmarpro.com%2Fbulletins%2F10214643&vehicle=Service%20bulletin%2021-018-22)