2024 Jeep Wrangler Hybrid Control Processor Fault B12B4-00

A Technical Service Bulletin (TSB) has been released for the 2024 Jeep Wrangler concerning an issue with the Hybrid Control Processor (HCP) and the Charger Status Indicator Module. This TSB, identified by NHTSA ID 10248548, addresses a specific diagnostic trouble code (DTC) B12B4-00 that may be set within the vehicle's electrical system.

This communication highlights a potential internal fault within the Charger Status Indicator Module, which is a critical component of the vehicle's hybrid management and propulsion system. Owners of affected 2024 Jeep Wrangler vehicles experiencing a 2024 Jeep Wrangler Hybrid Control Processor Fault should be aware of this bulletin.

Symptoms

While the TSB summary does not detail specific owner-perceptible symptoms, the presence of the B12B4-00 fault code suggests an underlying issue within the hybrid electrical system. Owners might observe warning lights related to the hybrid system, charging, or general electrical system malfunctions. The fault is described as "Hybrid Control Processor (HCP) Sets B12B4-00 Charger Status Indicator Module Internal."

Fault Codes / DTCs

The primary diagnostic trouble code associated with this issue is:

• B12B4-00: Charger Status Indicator Module Internal

This code points directly to an internal malfunction within the module responsible for indicating charger status, managed by the Hybrid Control Processor (HCP).

Diagnosis and Trigger Conditions

The TSB indicates that the 2024 Jeep Wrangler Hybrid Control Processor Fault is triggered by an internal condition within the Charger Status Indicator Module. Technicians will likely use diagnostic tools to confirm the presence of the B12B4-00 DTC and further investigate the integrity of the Hybrid Control Processor (HCP) and associated electrical components.

Repair Procedure Summary

This Technical Service Bulletin (NHTSA ID 10248548) provides guidance to dealerships on how to diagnose and address the B12B4-00 fault. While specific repair steps are not detailed in the summary, such TSBs typically involve diagnostic routines, potential software updates, or replacement of the affected Charger Status Indicator Module or Hybrid Control Processor (HCP) if deemed faulty. The aim is to resolve the internal module issue and restore proper functionality to the hybrid electrical system.

Owner Action

If you own a 2024 Jeep Wrangler and suspect an issue with your hybrid system, or if your vehicle's diagnostic system indicates a fault, it is recommended to contact your authorized Jeep dealership. Inform them about the potential 2024 Jeep Wrangler Hybrid Control Processor Fault and the associated TSB (NHTSA ID 10248548). The dealership will be able to perform the necessary diagnostics and repairs according to the manufacturer's guidelines.

Source: NHTSA ID: 10248548