2024 Jeep Wrangler Engine Hesitation TSB 18-092-25

Owners of certain 2024 Jeep Wrangler vehicles may encounter a Jeep Wrangler engine hesitation issue, characterized by a momentary stumble or misfire. This condition typically occurs during light acceleration, specifically when the transmission shifts from 3rd to 4th gear, and the engine RPM is between 1,600 and 2,100. Stellantis has released Technical Service Bulletin (TSB) 18-092-25 to address this concern through a software update for the Powertrain Control Module (PCM).

It is important to note that TSB 18-092-25 is specifically applicable to vehicles sold in the Enlarged Europe market and is not intended for vehicles built for the US market.

Symptoms of Engine Hesitation

Customers may experience the following symptoms related to the Jeep Wrangler engine hesitation:

• "Momentary hesitation in the engine when the vehicle is shifting from 3rd to 4th gear under light load and light acceleration."
• This hesitation primarily occurs between 1,600 and 2,100 RPM.
• The sensation is often described as an "engine stumble or a misfire."

These symptoms are attributed to the existing PCM software, which requires an update to optimize engine performance during specific driving conditions.

Diagnosis and Trigger Conditions

To diagnose the Jeep Wrangler engine hesitation, technicians will use a Scan Tool, such as wiTECH, to verify the functionality of all related systems. If the customer's description matches the symptoms outlined in the TSB, the repair procedure should be followed. Any other Diagnostic Trouble Codes (DTCs) or unrelated symptom conditions must be addressed and repaired before proceeding with the PCM software update.

Repair Procedure Summary

The resolution for the Jeep Wrangler engine hesitation involves reprogramming the Powertrain Control Module (PCM) with the latest available software. The general steps for this procedure are:

1. Prepare the Vehicle: A battery charger must be connected to the vehicle to maintain battery voltage between 13.2 and 13.5 volts throughout the flash process. This prevents voltage drops that could interrupt or corrupt the software update.
2. Reprogram PCM: The PCM is reprogrammed using the wiTECH Diagnostic Application to install the most current software version.
3. Clear DTCs: After the reprogramming is complete, the wiTECH application will automatically prompt the technician to clear any DTCs that may have been set in any module during the process.

Important Warnings for Technicians and Owners

Several critical notes are provided within TSB 18-092-25 to ensure a successful repair and proper warranty claim:

• Battery Voltage: "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." Maintaining stable voltage is crucial for preventing module damage during programming.
• Flash Interruption: "If this flash process is interrupted/aborted, the flash should be restarted." Attempting to continue an interrupted flash can lead to module corruption.
• Failure Code: The dealer is instructed to use "Failure Code CC" (Customer Concern) when processing claims related to this TSB. This code should only be used if the customer's reported concern directly matches the symptoms described in the bulletin.
• 3C's Requirement: When using Failure Code CC, the 3C's (customer's concern, cause, and correction) must be provided for processing the Technical Service Bulletin flash/reprogramming conditions.

Required Tools or Parts

The primary tool required for this repair is a wiTECH or Equivalent diagnostic scan tool, which is necessary to perform the PCM reprogramming.

Owner Action

If you own a 2024 Jeep Wrangler (specifically those sold in the Enlarged Europe market) and are experiencing a Jeep Wrangler engine hesitation as described, you should contact an authorized Stellantis service center. The repair, which involves a PCM software update, is reimbursable under the provisions of the vehicle's warranty. The estimated labor time for this procedure is 0.4 hours, identified by Labor Operation No: 18-19-06-9D.

---

Source: NHTSA ID: 11025497