2024 Jeep Wrangler Engine Hesitation TSB

Important Warning: Market Applicability

It is crucial for owners to understand that Technical Service Bulletin (TSB) 18-092-25 REV. A is specifically for 2024 Jeep Wrangler vehicles sold in the Middle East & Africa and Enlarged Europe markets. This bulletin does not apply to vehicles built for the North American market. Owners in the US or Canada should not expect their vehicle to be covered by this particular service action.

Symptoms

Owners of affected 2024 Jeep Wrangler models may notice a specific performance issue. The primary symptom is a "Momentary hesitation in the engine when the vehicle is shifting from 3rd to 4th gear under light load and light acceleration." This hesitation typically occurs within the engine speed range of 1,600 and 2,100 RPM. Drivers might describe this sensation as an "engine stumble or a misfire."

Cause

The root cause of the 2024 Jeep Wrangler engine hesitation described in TSB 18-092-25 REV. A is identified as an issue with the Powertrain Control Module (PCM) software. An outdated or improperly calibrated software version can lead to the observed shifting anomalies and engine performance issues.

Diagnosis

When a customer reports symptoms consistent with the 2024 Jeep Wrangler engine hesitation, technicians will use a Scan Tool, such as wiTECH, to perform diagnostic procedures. They will verify that all related systems are functioning correctly. If no other Diagnostic Trouble Codes (DTCs) or unrelated symptoms are present, and the customer's concern matches the described hesitation, the repair procedure outlined in TSB 18-092-25 REV. A should be followed.

Repair Procedure Summary

The repair for the 2024 Jeep Wrangler engine hesitation involves updating the PCM software. The general procedure is as follows:

1. Battery Management: Before starting, a battery charger must be connected to the vehicle. This ensures the battery voltage remains between 13.2 and 13.5 volts throughout the reprogramming process. It is critical not to let the voltage drop below 13.2 volts or exceed 13.5 volts.
2. PCM Reprogramming: The Powertrain Control Module (PCM) will be reprogrammed with the latest available software using the wiTECH Diagnostic Application. If the flash process is interrupted, it must be restarted.
3. DTC Clearing: After successful reprogramming, any Diagnostic Trouble Codes (DTCs) that may have been set in any module due to the reprogramming process will be cleared. The wiTECH application will automatically present and allow clearing of these DTCs.

This repair is covered under warranty provisions, and the labor operation number for this service is 18-19-06-9D, with an estimated labor time of 0.4 hours.

Required Tools

To perform this service, technicians will require a wiTECH diagnostic tool or an equivalent system capable of reprogramming the PCM. A suitable battery charger is also essential to maintain stable voltage during the software update process.

Owner Action

If you own a 2024 Jeep Wrangler in the Middle East & Africa or Enlarged Europe markets and are experiencing the described engine hesitation, you should contact your authorized Jeep dealer. Inform them of the symptoms you are experiencing, specifically the "Momentary hesitation in the engine when the vehicle is shifting from 3rd to 4th gear under light load and light acceleration." The dealer will use failure code CC (Customer Concern) if your symptoms match the bulletin's description. The repair involves a software update to the PCM and should be performed by a qualified technician.

Source: NHTSA ID: 11025713