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Service bulletin 21-002-14

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 id10136955
Published by NHTSA2018-05-21
Manufacturer's number21-002-14
Manufacturer's date2014-02-14
NHTSA componentPOWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE (TCM/PCM/TECM); ELECTRICAL SYSTEM

NHTSA's summary

Flash: Shift Quality Improvements While in 4X4 Low-Range Mode This bulletin involves flash reprogramming of the Transmission Control Module (TCM) with new software. Customers may indicate that the shift quality while in 4X4 low range mode does not meet their expectations.

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, Transmission and driveline, Automatic transmission, Transmission control module

Vehicles listed
DODGE DURANGO2014

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
90045092022-05-31. Service bulletin. Oil Filter If a Mopar Oil Filter is not available, use a filter that meets or exceeds USCAR36 specification and is compatible with semi and full synthetic oils. Recommended Brands: Wix, Purolator, and NapaGold
18-056-162020-10-26. Service bulletin. Flash: Powertrain Diagnostic and System Improvements This bulletin involves reprogramming the Powertrain Control Module (PCM) with the latest available software. The following powertrain system improvements/enhancements are included in this software release. These symptoms are broken down by vehicle: 2015 WK 3.0L engine (Sales Code EHD) · ** P0456 - EVAP System Small Leak.** · Enhancements to remote engine start. 2015 WK 5.7L engine (Sales Code EZH) · ** P0456 - EVAP System Small Leak.** · U0140-00 - Lost Communication with Body Control Module (BCM). · Enhancements to improve a slight lag or hesitation during Multi Displacement System (MDS) mode transitions. · Enhancements to improve a slight drop in engine RPM when the vehicle is shifted to reverse or drive within 3 seconds of a cold start. 2014 WD 5.7L engine (Sales Code EZH) · Enhancements to improve a slight drop in engine RPM when the vehicle is shifted to reverse or drive within 3 seconds of a cold start. 2015 WD 5.7L engine (Sales Code EZH) · ** P0456 - EVAP System Small Leak.** · Enhancements to remote engine start.
21-012-14 REV. A2018-06-18. Service bulletin. Transmission Shift Enhancements - Adaptation Drive Learn Procedure This bulletin involves performing a subjective shift quality rating when customers experience poor shift quality and if necessary, performing the transmission adaptation learn procedure. In addition, this bulletin involves performing transmission adaptation learn procedure when the transmission is repaired/replaced and/or the valve body/TCU assembly (mechatronic) is replaced, or when the adaptation memory cells are cleared with the wiTECH diagnostic scan tool. Customers may indicate that their transmission shift quality does not meet their expectations.
18-008-14 REV. A2018-05-21. Service bulletin. Flash: MIL Illumination P0300- Multiple Cylinder Misfire and/or P0573- Brake Switch 1 Stuck Off This bulletin involves selectively erasing and reprogramming the Powertrain Control Module (PCM) with new software. A small number of customers may experience a Malfunction Indicator Lamp (MIL) illumination. Upon further investigation the Technician may find that the following Diagnostic Trouble Codes have been set: (only applies to 5.7L engines) P0573 - Brake Switch 1 Stuck OffThe following powertrain system improvements/enhancements are also included in this software release: Corrected a generic scan tool display issue regarding Mode 6 data accuracy. (only applies to 5.7L engines)
21-012-142016-06-02. Service bulletin. SUMMARY TO BE PROVIDED ON A FUTURE DATE.
21-012-14REV.A2016-06-02. Service bulletin. SUMMARY TO BE PROVIDED ON A FUTURE DATE.
21-030-142016-05-09. Service bulletin. SUMMARY TO BE PROVIDED ON A FUTURE DATE.
21-030-14REV.A2016-05-09. Service bulletin. SUMMARY TO BE PROVIDED ON A FUTURE DATE.
SB-18-008-142014-05-10. Service bulletin. JEEP/DODGE: DIAGNOSTIC TROUBLE CODES (DTCS) ARE SET ON MULTIPLE CYLINDER MISFIRE, BRAKE SWITCH 1 STUCK OFF CAUSING MALFUNCTION INDICATOR LAMP (MIL) TO ILLUMINATE AND NEW SOFTWARE FOR SELECTIVE ERASING AND REPROGRAMMING OF POWERTRAIN CONTROL MODULE (PCM). MODEL 2014 GRAND CHEROKEE, DURANGO. *PE