2024 Jeep Wrangler 4WD System Warning & DTC C147B-92 TSB
Jeep has issued TSB 08-355-26 for certain 2024 Wrangler models to address issues with the 4WD system, including warning lights, MIL illumination, and DTC C147B-92. The fix involves a software update to the Drivetrain Control Module (DTCM).
Symptoms
Customers driving a 2024 Jeep Wrangler may experience a Malfunction Indicator Lamp (MIL) illuminating on the dashboard. This is often accompanied by other 4WD system warning lights, service messages, or flashing indicators displayed in the Instrument Panel Cluster (IPC). A key symptom is that the vehicle may not engage 4WD properly. These issues are specifically for the 2024 Jeep Wrangler equipped with Command-Trac Part Time 4WD (DHN), 2.72:1 Select-Trac Full Time 4WD (DHP), 4:1 Rock-Trac HD Part Time 4WD (DHW), or 4:1 Rock-Trac HD Full Time 4WD (DHF) systems.
Fault Codes / DTCs
The primary Diagnostic Trouble Code (DTC) associated with this issue is C147B-92, which indicates "Front Axle Disconnect Sensor Performance or Incorrect Operation." This code will be set in the vehicle's system when the symptoms described for the 2024 Jeep Wrangler 4WD system warning occur.
Diagnosis / Trigger Conditions
Diagnosis for the 2024 Jeep Wrangler 4WD system warning involves using a wiTECH scan tool to verify all related systems are functioning correctly. If a customer reports the symptoms listed, the repair procedure outlined in Technical Service Bulletin (TSB) 08-355-26 should be performed. Technicians should record any other DTCs or symptom conditions found before proceeding with the bulletin.
Important Warnings
Owners and technicians should be aware of critical steps during the repair process:
- Battery Voltage During Reprogramming: "Install a battery charger to ensure battery voltage does not drop below 13.2 volts. Do not allow the charging voltage to climb above 13.5 volts during the flash process."
- Interrupted Flash Process: "If this flash process is interrupted/aborted, the flash should be restarted."
Repair Procedure Summary
Technical Service Bulletin (TSB) 08-355-26 outlines a software update for the Drivetrain Control Module (DTCM). The repair process involves connecting a battery charger to maintain stable voltage between 13.2 and 13.5 volts throughout the procedure. Technicians will then reprogram the DTCM with the latest available software using the wiTECH Diagnostic Application. After successful reprogramming, all Diagnostic Trouble Codes (DTCs) that may have been set in any module due to the reprogramming process must be cleared. If any issues arise during the flash, the Helpdesk should be contacted.
Required Tools or Parts
The primary tool required for this service is a wiTECH diagnostic scan tool or an equivalent system. A battery charger capable of maintaining specific voltage levels (13.2-13.5 volts) is also essential during the reprogramming process. The labor operation number for this procedure is 18-19-07-BN.
Owner Action
If your 2024 Jeep Wrangler is experiencing 4WD system warning lights, the Malfunction Indicator Lamp (MIL) illumination, or issues with 4WD engagement, and a Diagnostic Trouble Code C147B-92 is present, you should visit an authorized Jeep dealership. This repair, identified by TSB 08-355-26, involves a software update to the Drivetrain Control Module (DTCM) and is reimbursable under warranty provisions. The estimated labor time for this procedure is 0.3 hours. Ensure you mention the 2024 Jeep Wrangler 4WD system warning when you schedule your appointment.
Source: NHTSA ID 11038545
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Frequently Asked Questions
- What does DTC C147B-92 mean for my Jeep Wrangler?
- DTC C147B-92 in your 2024 Jeep Wrangler indicates a "Front Axle Disconnect Sensor Performance or Incorrect Operation." This code is often associated with 4WD system warning lights and potential issues with 4WD engagement.
- Is the DTCM software update covered under warranty?
- Yes, the Drivetrain Control Module (DTCM) software update described in TSB 08-355-26 for the 2024 Jeep Wrangler 4WD system warning is reimbursable under the provisions of your vehicle's warranty.
What Jeep Wrangler owners report
Counted from the records in our database across 41 model years.
- 18,838
- Owner complaints
- 104
- Recalls
- 2,758
- Service bulletins
- 572
- Crashes reported
- 552
- Fires reported
- 435
- Injuries reported
The 2024 model year
970 complaints, the 4th most of 41 model years on file. Owners reported 14 crashes, 13 fires and 7 injuries for this year, which also has 14 recalls on file.
Electrical System, the system this article covers, accounts for 3,613 of 18,838 complaints (19%), including 568 for 2024.
Complaints by model year
| 2006 | 730 | |
|---|---|---|
| 2007 | 1,750 | |
| 2008 | 1,904 | |
| 2010 | 686 | |
| 2012 | 836 | |
| 2014 | 658 | |
| 2018 | 1,827 | |
| 2019 | 747 | |
| 2021 | 963 | |
| 2024 | 970 |
Most-reported systems
- Steering — 3,929
- Electrical System — 3,613
- Power Train — 2,470
- Engine — 2,406
- Fuel System — 2,015
Latest recalls for the 2024 model year
- 26V363000 — Steering (Jun 2026) — Park outside
- 26V327000 — Back Over Prevention (May 2026)
- 25V766000 — Engine (Nov 2025)
Recent owner reports about electrical system
Since the 68C Recall software update was performed on my Jeep, the vehicle has experienced recurring, unexpected losses of motive power while driving in Electric Mode. During these events, pressing the accelerator yields no response.
Read owner complaints →The contact owns a 2024 Jeep Wrangler. The contact received notification of NHTSA Campaign Number: 25V710000 (ELECTRICAL SYSTEM); however, the part to do the recall repair was unavailable.
Complaints are owner reports filed with NHTSA. They are unverified, and counts depend on how many vehicles were sold, so they are not a failure rate.
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