2024 Jeep Wrangler PCM Update for MIL and DTCs
A Technical Service Bulletin (TSB 18-008-25) has been issued for the 2024 Jeep Wrangler to address various Powertrain Control Module (PCM) related issues. Owners may experience a Malfunction Indicator Lamp (MIL) illumination, specific Diagnostic Trouble Codes (DTCs), rough engine operation, or a…
Owners of the 2024 Jeep Wrangler may encounter various performance issues and warning lights, indicating a potential problem with the Powertrain Control Module (PCM). This Technical Service Bulletin (TSB) 18-008-25, also released as Rapid Service Update (RSU) 24-109, outlines a software update designed to correct these concerns. This bulletin supersedes TSB 18-050-24 REV. B, dated September 05, 2024.
This 2024 Jeep Wrangler PCM update specifically targets vehicles equipped with the 3.6L V6 VVT Engine Upgrade 1 (Sales Code ERC) that were built on or before August 16, 2024 (MDH 0816XX).
Symptoms
Owners may notice a Malfunction Indicator Lamp (MIL) illumination on the dashboard. This is often accompanied by one or more specific Diagnostic Trouble Codes (DTCs). Beyond warning lights, drivers might also experience a vehicle that runs rough, indicating engine performance issues.
Other reported symptoms include a “Service Transmission” message appearing in the Instrument Panel Cluster (IPC). This message can be triggered by clutch slip detection when the transfer case is in neutral. During flat towing, a “Transfer case mis-shift (engine running and clutch pedal up, transmission in gear)” might occur. This 2024 Jeep Wrangler PCM update aims to resolve these operational issues, along with improvements to address vehicle no-starts after PCM replacement, O2 heater crack improvements, and general OBD software changes.
Fault Codes / DTCs
When the Malfunction Indicator Lamp (MIL) illuminates, technicians may find one or more of the following DTCs stored in the system, often related to O2 sensor circuits, charging system output, or system voltage:
| Code | Description |
|---|---|
| P0032 | O2 - Sensor 1/1 Heater Circuit High |
| P0038 | O2 - Sensor 1/2 Heater Circuit High |
| P0052 | O2 - Sensor 2/1 Heater Circuit High |
| P0058 | O2 - Sensor 2/2 Heater Circuit High |
| P1129 | Closed Loop Fueling Not Achieved-Banks 2 Upstream |
| P0152 | O2 Sensor 2/1 Circuit High |
| P0158 | O2 Sensor 2/2 Circuit High |
| P2504 | Charging System Output High |
| P0563 | System Voltage High |
Diagnosis
To diagnose these issues, technicians will use a Scan Tool (wiTECH) and follow the diagnostic procedures available in DealerCONNECT/Service Library. This ensures all related systems are functioning correctly. If any DTCs or symptom conditions beyond those listed in the TSB are present, they should be recorded and addressed before proceeding with the PCM reprogramming. Technicians must verify if a customer's VIN is listed in VIP or the RSU VIN list to confirm applicability.
Important Warnings
Owners and technicians should be aware of several critical instructions related to this service bulletin and the 2024 Jeep Wrangler PCM update:
- Battery Charger Requirement: "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." This is crucial to prevent interruptions during the software update.
- Interrupted Flash: "If this flash process is interrupted/aborted, the flash should be restarted."
- Failure Code Usage: "The dealer must use failure code CC with this Technical Service Bulletin." The
Frequently Asked Questions
- What is TSB 18-008-25 for the 2024 Jeep Wrangler?
- TSB 18-008-25, also known as Rapid Service Update (RSU) 24-109, is a Technical Service Bulletin that addresses various issues related to the Powertrain Control Module (PCM) in the 2024 Jeep Wrangler. It involves reprogramming the PCM with updated software to resolve symptoms like MIL illumination and specific DTCs.
- What are the common symptoms addressed by this 2024 Jeep Wrangler PCM update?
- Owners may experience a Malfunction Indicator Lamp (MIL) illumination, rough engine operation, or messages such as “Service Transmission” on the instrument panel. Specific Diagnostic Trouble Codes (DTCs) like P0032, P0052, P0563, and others related to O2 sensors or charging system output are also covered.
- Which 2024 Jeep Wrangler vehicles are affected by this TSB?
- This TSB applies to 2024 Jeep Wrangler (JL) vehicles equipped with the 3.6L V6 VVT Engine Upgrade 1 (Sales Code ERC) that were manufactured on or before August 16, 2024 (MDH 0816XX).
- What is the repair procedure for this PCM issue?
- The repair involves reprogramming the Powertrain Control Module (PCM) with the latest available software using a wiTECH diagnostic tool. A battery charger must be connected during the process to maintain stable voltage. If certain DTCs return after the flash, further diagnostics may be required.
- Will I be charged for this PCM software update?
- According to the TSB, all repairs for this issue are reimbursable within the provisions of the vehicle's warranty. Technicians will use specific labor operation codes like 18-19-06-AU or 18-19-06-AW for claiming.
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.
Power Train and Engine, the system this article covers, accounts for 4,482 of 18,838 complaints (24%), including 646 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 power train and engine
2024 Jeep Wrangler 4xe models. Sudden loss of power while driving up hill in the electric mode. It would not go over 59 miles per hour and then it switched over to hybrid all on its own. This happened a few times and I could not go fast enough on the freeway.
Read owner complaints →My jeep after the 68c recall work was performed to lessen the chances of a fire caused by the hybrid battery now under performs compared to before the recall. I get much less that the advertised EV / Battery only miles.
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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