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Service bulletin 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 id10020115
Published by NHTSA2006-07-22
Manufacturer's number21
Manufacturer's date2006-05-01
NHTSA componentELECTRICAL SYSTEM

NHTSA's summary

THE SOFTWARE PROGRAMMED INTO THE BODY CONTROL MODULE MAY CAUSE THE BATTERY TO DISCHARGE AND PREVENT THE VEHICLE FROM STARTING UNDER CERTAIN CONDITIONS. CUSTOMER SATISFACTION NOTIFICATION F21 - REPROGRAM BODY CONTROL MODULE. *TT

The document

No address for NHTSA's copy can be built for this communication. Ask the dealer for it by the manufacturer's number.

Components

Electrical system

Vehicles listed
JEEP LIBERTY2006

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

Recalls for the same vehicles and component
20151632015-04-16. Electrical
07V0890002007-03-09. ELECTRICAL SYSTEM
06V0360002006-02-09. ELECTRICAL SYSTEM:WIRING:FRONT UNDERHOOD

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
90042752023-01-09. Service bulletin. KEY, Master If replacing the key/FOBIK on a WJ, KJ, TJ, or PT Cruiser, use the "AC" NIC level part number. The "AB" NIC level will not program to these platforms. For all other platforms, if the "AB" NIC level will not program to the vehicle, use the "AC" NIC level part and submit a part warranty.
90042752022-09-26. Service bulletin. KEY, Master If replacing the key/FOBIK on a WJ, KJ, TJ, or PT Cruiser, use the "AC" NIC level part number. The "AB" NIC level will not program to these platforms. For all other platforms, if the "AB" NIC level will not program to the vehicle, use the "AC" NIC level part and submit a part warranty.
08-049-202020-05-26. Service bulletin. Charging System, Battery Diagnostic Tools and Warranty This information only bulletin discusses using the correct test equipment for testing batteries and charging systems, and also warranty reimbursement when battery replacements are necessary.
SB-18-014-092009-09-23. Service bulletin. CHRYSLER/JEEP: FLASH: ESP SYSTEM MAY PREMATURELY ACTIVATE MOMENTARILY WHEN NEGOTIATING A CURVE OR MIL ILLUMINATION DUE TO DIAGNOSTIC TROUBLE CODE P0340, P0344 OR P0116. THIS INVOLVES SELECTIVELY ERASING AND REPROGRAMMING THE POWERTRAIN CONTROL MODULE (PCM) WITH NEW SOFTWARE. *PE UPDATED 5/24/10. *PE
18009062006-04-12. Service bulletin. ENHANCED TORQUE CONVERTER AND GLOW PLUG OPERATION OR BRAKE SWITCH DTC P0504. *TT
060022006-02-23. Service bulletin. FLASH TCM AND ECM TO IMPROVE TORQUE CONVERTER OPERATION. *TT
050352006-01-11. Service bulletin. RAPID RESPONSE TRANSMITTAL SERVICE ACTION TEST AND REPLACE BATTERY AS NECESSARY. *TS