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Service bulletin 21-004-25

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 id11012829
Published by NHTSA2025-01-14
Manufacturer's number21-004-25
Manufacturer's date2025-01-11
NHTSA componentELECTRICAL SYSTEM; POWER TRAIN
Manufacturer's systemTransmission Control Module

NHTSA's summary

"Flash: Transmission Control Module (TCM) Updates Customers must experience a Malfunction Indicator Lamp (MIL) illumination and the vehicle must exhibit/set one or more of the following Diagnostic Trouble Codes (DTCs): ● P06E4 - Control Module Wake-up Circuit Performance. ● B12B4 - Charge Status Indicator Module Internal. ● P061B - Internal Control Module Torque Calculation Performance. ● P0810 - Clutch Position Control Error. ● P2885 - Engine Disconnect Clutch Engagement Fault. Customers may experience one or more of the following: ● Vehicle loses propulsion capability. ● 'Shift To Park' notification on. ● 'Service Transmission' warning light on. ● Requires key cycle to recover. ● Shifts rough occasionally. ● Harsh shifts when tipping in during a coast down. ● Shifts roughly during coast down. This bulletin involves reprogramming the Transmission Control Module (TCM), Powertrain Control (PCM) and the Auxiliary Hybrid Control Processor (AHCP) also known as Power Inverter Module (PIM) or reprogramming the TCM and PCM only with the latest available software"

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

Trouble codes named

B12B4, P061B, P06E4, P0810, P2885

Vehicles listed
JEEP WRANGLER 4XE2024 (the catalog's model; the bulletin names a series or trim of it)

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

Recalls for the same vehicles and component
25V7410002025-10-30. ELECTRICAL SYSTEM:PROPULSION SYSTEM:TRACTION BATTERY
25V7100002025-10-17. ELECTRICAL SYSTEM:PROPULSION SYSTEM:HYBRID MANAGEMENT:POWER CONTROL UNIT/MODULE (HPCU):SOFTWARE
24V8710002024-11-19. EXTERIOR LIGHTING; ELECTRICAL SYSTEM:WIRING
24V7200002024-09-27. ELECTRICAL SYSTEM:PROPULSION SYSTEM:TRACTION BATTERY
24V6520002024-09-05. ELECTRICAL SYSTEM: INSTRUMENT CLUSTER/PANEL

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
S26080000382026-10-16. Service bulletin. High Voltage Battery Has Lower SOC After Overnight Sleep Cycle
08-355-262026-10-16. Service bulletin. Flash: Drivetrain Control Module (DTCM) Updates Customers must experience a Malfunction Indicator Lamp (MIL) illumination and the vehicle must SYMPTOM: exhibit/set the following Diagnostic Trouble Code (DTC): ● C147B-92 - Front Axle Disconnect Sensor Performance or Incorrect Operation Customers may comment on one or more of the following: ● 4WD system warning lights, service messages, or flashing indicators are displayed in the Instrument Panel Cluster (IPC). ● The vehicle does not engage 4WD properly. This bulletin involves reprogramming the DTCM with the latest available software.
S26080000382026-10-16. Service bulletin. High Voltage Battery Has Lower SOC After Overnight Sleep Cycle
08-355-262026-10-16. Service bulletin. Flash: Drivetrain Control Module (DTCM) Updates Customers must experience a Malfunction Indicator Lamp (MIL) illumination and the vehicle must SYMPTOM: exhibit/set the following Diagnostic Trouble Code (DTC): ● C147B-92 - Front Axle Disconnect Sensor Performance or Incorrect Operation Customers may comment on one or more of the following: ● 4WD system warning lights, service messages, or flashing indicators are displayed in the Instrument Panel Cluster (IPC). ● The vehicle does not engage 4WD properly. This bulletin involves reprogramming the DTCM with the latest available software.
S26210000042026-10-07. Service bulletin. The Customer May Complain About a Popping Noise, Grinding Noise, or an Intermittent No Reverse or Forward Transmission Engagement. The Tech May Find Damaged and/or Worn Transmission Output Shaft Splines (850RE Transmission Only)
1147412026-09-30. Service bulletin. TRANSMISSION KIT - WITH TORQUE CONVERTER
1147492026-09-30. Service bulletin. CHARGER - BATTERY
S2623000048 REV.A2026-09-17. Service bulletin. Customer States Driver Seat inoperative. Seat Fuse F59 30A Found blown.
91009002026-09-17. Service bulletin. Passive Entry O/S Dr Handle Prior to replacing an inoperative passive entry door handle, perform Star Online S2623000040.
91008722026-08-06. Service bulletin. Display Exchange part has been superseded. Order the latest Z part number: Z8607669AC --> Z8791155AA (Active Exchange Part) Z8607669AD --> Z8791669AA (Active Exchange Part) Z8607669AE --> Z8791156AA (Active Exchange Part) Z8607671AC --> Z8791157AA (Active Exchange Part) Z8607671AD --> Z8791158AA (Active Exchange Part) Z8607671AE --> Z8791159AA (Active Exchange Part)