2024 Alfa Romeo Tonale Steering Angle Sensor Fault

Owners of the 2024 Alfa Romeo Tonale may encounter an illuminated Malfunction Indicator Lamp (MIL) on their dashboard, potentially accompanied by a temporary loss of power steering assist. This issue is linked to a specific diagnostic trouble code (DTC) and is addressed by a manufacturer communication, specifically a Technical Service Bulletin (TSB) with NHTSA ID 10242788.

Symptoms You Might Notice

If your 2024 Alfa Romeo Tonale is affected, you might observe the following:

• The Malfunction Indicator Lamp (MIL) illuminates on the instrument cluster.
• During a key OFF and ON cycle, and when rotating the steering wheel, there may be a temporary loss of power assist.
• The MIL will activate due to a loss of calibration of the steering angle sensor. However, after turning the steering wheel lock to lock, the MIL may switch off.

Fault Codes / DTCs

Technicians investigating this concern will likely find the following diagnostic trouble code stored in the vehicle's system:

• C0529-00: Steering Angle Sensor Module Missing Calibration - No Subtype Information

This specific code points directly to an issue with the steering angle sensor's calibration within the Electric Power Steering (EPS) module.

Diagnosis and Trigger Conditions

The 2024 Alfa Romeo Tonale steering angle sensor issue typically manifests when the vehicle is turned off and then back on. If the steering wheel is rotated during this cycle without power assist, the system detects a calibration error in the steering angle sensor, triggering the MIL. The system is designed to clear the MIL once the steering wheel is turned fully from lock to lock, indicating a re-calibration attempt.

Repair Procedure Summary

To resolve the 2024 Alfa Romeo Tonale steering angle sensor issue, the Electric Power Steering (EPS) module requires a software update. This update ensures the EPS module has the latest calibration and operational parameters to prevent the MIL illumination and steering assist concerns.

Important Service Note

CAUTION! The supplier of this Electric Power Steering (EPS) system has indicated that multiple update steps are required to completely update this EPS module prior to returning the vehicle to the customer. This means the update process is not a single, quick procedure and requires careful attention from the technician.

Owner Action

If you own a 2024 Alfa Romeo Tonale and are experiencing the symptoms described, particularly the MIL illumination or any unusual steering behavior, it is recommended to schedule an appointment with an authorized Alfa Romeo dealership. They will be able to diagnose the issue, confirm the presence of DTC C0529-00, and perform the necessary Electric Power Steering (EPS) module software update as outlined in the TSB. This update should be covered under warranty.

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Source: NHTSA Manufacturer Communication 10242788