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Service bulletin 21-014-21

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)
TypeService bulletin
NHTSA id10190737
Published by NHTSA2021-04-26
Manufacturer's number21-014-21
Manufacturer's date2021-03-31
NHTSA componentELECTRICAL SYSTEM; POWER TRAIN; STRUCTURE

NHTSA's summary

Flash: Transmission Control Module (TCM) Updates This bulletin involves reprogramming the Transmission Control Module (TCM) with the latest available software. The following enhancement is included in this software update: Scan tool enhancement to address the ?Valve Body Solenoid Learn Routine? not running and the error message stating ?Parking brake not applied?, even though it is applied.

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

Body and frame, Electrical system, Transmission and driveline

Vehicles listed
RAM PROMASTER CITY2020

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

Other bulletins for the same vehicles and component
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