Service bulletin 21-022-14

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)
Type	Service bulletin
NHTSA id	10141220
Published by NHTSA	2018-06-18
Manufacturer's number	21-022-14
Manufacturer's date	2014-07-10
NHTSA component	ENGINE; EQUIPMENT

NHTSA's summary

4WD Lamp Illuminated and Diagnostic Trouble Code C140F Active in Final Drive Control Modules (FDCM) Memory This bulletin involves verifying FDCM software level and then flash reprogramming of the FDCM with new software. Customers may indicate that the ?Service 4WD? indicator in the instrument cluster is illuminated. They may also indicate that the transfer case will not shift from 4WD High, 4WD Low, and/or Neutral once the lamp is illuminated. Further investigation identifies that a Diagnostic Trouble Code C140F is stored or active in the Final Drive Control Modules (FDCM) Memory

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

Engine, Equipment and accessories

Trouble codes named

C140F

Vehicles listed
JEEP COMMANDER	2006, 2007, 2008, 2009, 2010
JEEP GRAND CHEROKEE	2005, 2006, 2007, 2008, 2009, 2010

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

Recalls for the same vehicles and component
10V085000	2010-03-05. EQUIPMENT
2008185	2008-05-23. Engine
2008042	2008-02-07. Engine

A recall listed here may apply to some of the same vehicles. Only the manufacturer can say whether it applies to one vehicle.

Other bulletins for the same vehicles and component
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S2209000004	2022-12-19. Service bulletin. 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.
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S1709000010RevB	2022-09-26. Service bulletin. Customer complaints may include abnormal engine noise, rough idle, lack of power, misfire. Upon investigation, it may be found that there is excessive camshaft lobe wear/lifter wear (roller failure) on one or more cam lobes and that camshaft/lifter replacement is necessary.
3100619	2022-09-15. Service bulletin. Repair Parts Used For Structural Repairs This bulletin involves discussing FCA US LLC position with regard to structural repair parts usage.
18-042-14	2022-08-15. Service bulletin. Generic Powertrain Control Module (PCM) Procedure This bulletin involves programming a generic PCM with software.
21-022-14 REV. A	2022-08-15. Service bulletin. 4WD Lamp Illuminated and Diagnostic Trouble Code C140F Active in Final Drive Control Modules (FDCM) Memory This bulletin involves verifying FDCM software level and then flash reprogramming of the FDCM with new software. Customers may indicate that the ?Service 4WD? indicator in the instrument cluster is illuminated. They may also indicate that the transfer case will not shift from 4WD High, 4WD Low, and/or Neutral once the lamp is illuminated. Further investigation identifies that a Diagnostic Trouble Code C140F is stored or active in the Final Drive Control Modules (FDCM) Memory
08-011-13	2022-07-25. Service bulletin. Flash: Power Folding Mirrors Unfold While Cranking This bulletin involves flash reprogramming the Left and Right Front Door Modules (DMFL/DMFR) with new software. The power folding mirrors may unfold while cranking the engine.