2021-2023 Jeep Wrangler ABS Module Initialization Issue

Owners of 2021-2023 Jeep Wrangler vehicles may encounter a specific problem with their Antilock Brake System (ABS) module. This issue, detailed in STAR Online Publication S2405000001 Rev A, occurs when a newly installed MOPAR service replacement ABS module fails to initialize correctly after service. This can lead to various diagnostic trouble codes (DTCs) being set in the vehicle's system.

Symptoms

The primary symptom is that the Antilock Brake System (ABS) Module Will Not Initialize After Recent Service Replacement. This occurs specifically after a new MOPAR service replacement ABS module has been installed, and the wiTECH initialization routines fail to complete successfully. This failure in the Jeep Wrangler ABS module initialization process can prevent proper operation of the braking and stability systems.

Fault Codes / DTCs

When the Jeep Wrangler ABS module initialization issue occurs, one or more of the following Diagnostic Trouble Codes (DTCs) may be set:

Code	Description
C0042-54	Brake Pedal Position Sensor-Missing Calibration
C2200-46	Anti-lock Brake Module Internal-Calibration / Parameter Memory Failure
C2206-00	Vehicle Configuration Mismatch
C2212-00	ECU In - Plant Mode
C006C-9A	Stability System-Component or System Operating Conditions
C220B-00	ABS ACC Valves Not Calibrated
C006A-54	Multi-axis Acceleration Sensor-Missing Calibration

Diagnosis and Trigger Conditions

The problem is specifically triggered when a new MOPAR service replacement ABS module is installed in a 2021-2023 Jeep Wrangler, and the subsequent wiTECH initialization routines fail. If these conditions are met, technicians are advised to first label and retain the original ABS module. It is also suggested to reinstall the original module and run through the original DTCs set. Technicians should also inspect the module's pins, power, ground, and bus connections to ensure they are not damaged and pass inspection.

Important Warnings and What Owners Should Know

If diagnostics and inspections indicate the need for ABS replacement, it's important to note that engineering is actively investigating the reported DTCs and initialization failures. An update regarding a resolution will be provided via this STAR Online Publication number, S2405000001 Rev A. Owners and technicians are encouraged to select the blue button “GET NOTIFIED” in the upper right of the STAR Online Publication window to receive updates when a resolution becomes available.

Furthermore, if the ABS module in your vehicle was replaced prior to January, it is crucial to compare the current StarPARTS ABS module part number with the one installed in the vehicle. If there is a discrepancy, the StarPARTS listed part should be ordered and placed on Vehicle Off Road (VOR) priority when possible.

Manufacturer's Guidance

This communication, S2405000001 Rev A, serves as a record of past experiences and indicates that engineering is currently investigating the root cause of the ABS module initialization failures. The document does not provide a definitive conclusion about what is wrong with the vehicle but compiles similar cases to assist technicians in their diagnostic process. A resolution is pending, and updates will be provided.

Owner Action

If you own a 2021-2023 Jeep Wrangler and experience issues with your ABS module not initializing after a recent replacement, especially if accompanied by the listed DTCs, you should contact your authorized Jeep dealership. Inform them about the symptoms and the specific STAR Online Publication S2405000001 Rev A. Since engineering is investigating, your dealer can provide the latest information and guidance as a resolution becomes available.

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Source: NHTSA ID 11012875