2024 Alfa Romeo & Dodge Warning Light B12C7 B12C8

Owners of certain 2024 Alfa Romeo and Dodge vehicles may encounter a persistent warning light on their dashboard after specific repair work. This issue, documented in Technical Service Bulletin (TSB) 9100751, specifically affects the 2024 Alfa Romeo Tonale, Dodge Hornet, and Alfa Romeo Stelvio models.

The TSB highlights a situation where a warning light illuminates following the replacement of the Occupant Restraint Controller (ORC) or HALF module. This condition is typically accompanied by specific diagnostic trouble codes (DTCs) that point to a software calibration need.

Symptoms You Might Notice

The primary symptom described in TSB 9100751 is a "Warning light on after replacing" a component related to the airbag system. This warning light indicates a fault within the vehicle's safety systems, specifically concerning the Airbag (ORC) and its lane control feedback function.

If you've recently had work done on your vehicle's airbag system or related modules and now see a persistent warning light, your vehicle may be experiencing this specific issue. This is a critical safety system, and any warning light should be addressed promptly.

Fault Codes / DTCs

When diagnosing this issue, technicians will likely find one or both of the following diagnostic trouble codes (DTCs):

• B12C7: Airbag (ORC) Lane control feedback (HALF) DTC
• B12C8: Airbag (ORC) Lane control feedback (HALF) DTC

These codes specifically indicate a problem with the feedback from the Occupant Restraint Controller (ORC) related to the lane control system, often triggered by the replacement of the ORC or HALF module.

Diagnosis and Trigger Conditions

The issue, leading to the Alfa Romeo Tonale warning light, is triggered specifically after replacing the Airbag (ORC) module or the HALF module. The Occupant Restraint Controller (ORC) is a crucial component responsible for deploying airbags and managing other safety features during a collision. The HALF module's exact function isn't detailed in this TSB, but it's clearly linked to the ORC's operation and feedback.

When either of these components is replaced, the vehicle's secure gateway system requires a software update to properly calibrate and integrate the new part. Without this update, the system reports a fault, resulting in the persistent warning light and the associated DTCs B12C7 and B12C8.

Repair Procedure Summary

The resolution for the persistent Alfa Romeo Tonale warning light and associated DTCs B12C7 and B12C8 involves a software update. According to TSB 9100751, a "secure gateway software update needed" is required in cases of ORC or HALF replacement. This update, referred to as "SGW CALIBRATION SW," ensures that the newly installed components are correctly recognized and integrated into the vehicle's electronic architecture.

The secure gateway is a cybersecurity feature in modern vehicles that protects the internal network from unauthorized access. When safety-critical modules like the ORC are replaced, the secure gateway often needs to be recalibrated or updated to ensure secure and proper communication within the vehicle's systems. The part numbers associated with this calibration software are 52270719, 52271166, and 52271167.

Owner Action

If you own a 2024 Alfa Romeo Tonale, Dodge Hornet, or Alfa Romeo Stelvio and have recently had your ORC or a related module replaced, and you now see a warning light on your dashboard, you should contact your authorized dealer. Inform them about the persistent warning light and mention TSB 9100751. The dealer will be able to diagnose the issue using the DTCs B12C7 or B12C8 and perform the necessary secure gateway software update to resolve the problem.

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Source: NHTSA ID: 11027740