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Service bulletin 21-027-21 REV. A

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 id10204376
Published by NHTSA2021-12-13
Manufacturer's number21-027-21 REV. A
Manufacturer's date2021-11-05
NHTSA componentELECTRICAL SYSTEM; POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE (TCM/PCM/TECM); POWER TRAIN; EXTERIOR LIGHTING; ELECTRICAL SYSTEM:SOFTWARE

NHTSA's summary

Flash: Transmission Control Module (TCM) Updates This bulletin involves reprogramming the TCM with the latest available software. Customers may experience a Malfunction Indicator Lamp (MIL) illumination. Upon further investigation the technician may find the following Diagnostic Trouble Code (DTC) has been set:P032F - Combustion Engine Producing Insufficient Torque. Customers may also experience a shift quality issue during a 5-4 downshift.

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

Electrical system, Lighting, Transmission and driveline, Automatic transmission, Software, Transmission control module

Trouble codes named

P032F

Vehicles listed
JEEP GRAND CHEROKEE2021

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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