2024 Alfa Romeo Stelvio PCM Update for P0606 MIL

Owners of 2024 Alfa Romeo Stelvio vehicles equipped with the 2.9L V6 Twin Turbo PDI Engine (Sales Code EEC) may experience a specific set of symptoms related to the vehicle's Powertrain Control Module (PCM). This issue is addressed by Technical Service Bulletin (TSB) 18-006-25, issued on February 8, 2025.

This bulletin focuses on updating the PCM software to resolve these concerns. If you own a 2024 Alfa Romeo Stelvio and are experiencing these symptoms, a software update is likely needed to correct the Alfa Romeo Stelvio P0606 issue.

Symptoms

Customers may notice a "Malfunction Indicator Lamp (MIL) illumination" on the dashboard. This warning light indicates a problem with the vehicle's emissions system or engine. In conjunction with the MIL, the vehicle may also exhibit the following:

• "Vehicle goes into limp-in mode."

Fault Codes / DTCs

When these symptoms occur, a diagnostic scan tool will typically reveal a specific Diagnostic Trouble Code (DTC):

Code	Description
P0606	Control Module Processor

Cause of the Issue

The root cause for the "Malfunction Indicator Lamp (MIL) illumination" and the associated DTC P0606 is identified as an internal PCM software issue. This software anomaly can affect the proper functioning of the control module processor.

Diagnosis

Before proceeding with any repairs, a technician will use a wiTECH scan tool to verify that all related systems are functioning correctly. Any other Diagnostic Trouble Codes (DTCs) or symptom conditions not specifically listed in TSB 18-006-25 must be addressed and repaired prior to applying this bulletin. If the customer's concern or a technician's finding matches the DTC P0606, the repair procedure outlined in this bulletin should be followed.

Important Warnings

During the reprogramming process, specific precautions must be taken to ensure a successful update and prevent damage:

• Battery Voltage: A battery charger must be installed to maintain voltage between 13.2 and 13.5 volts. Technicians are warned: "Do not allow the charging voltage to climb above 13.5 volts during the flash process."
• Interruption: If the flash process is "interrupted/aborted," it must be restarted from the beginning.
• Engine Conditions: Before performing certain steps in the repair, the vehicle's ignition must be in the ON position, the engine OFF, and the engine temperature must be above 80 °C (176 °F).

Repair Procedure Summary

The repair for the Alfa Romeo Stelvio P0606 involves updating the Powertrain Control Module (PCM) software. This vehicle is equipped with two Engine Control Modules (ECMs), referred to as Primary and Secondary (also known as PCM and ECM2), both of which require the latest software.

1. Primary PCM Reprogramming: The Primary PCM is reprogrammed first using the latest available software via the wiTECH Diagnostic Application. If any issues arise during this step, a ticket should be submitted to the Helpdesk.
2. Secondary PCM Reprogramming: Following the Primary PCM, the Secondary PCM (ECM2) is then reprogrammed with its latest software, also using wiTECH.
3. Control Unit Reprogramming Routine (ECM): After both modules are flashed, the "Control unit reprogramming" routine is performed within the ECM's “Misc. Functions” menu tab in wiTECH.
4. Control Unit Reprogramming Routine (ECM2): The same "Control unit reprogramming" routine is then performed for the ECM2 within its “Misc. Functions” menu tab.
5. Oil Level Sensor Replacement Routine: With the ignition on, engine off, and engine temperature above 80 °C (176 °F), the "Oil level sensor replacement" routine is executed in the ECM2 “Misc. Functions” menu tab.
6. Clear DTCs: Finally, any Diagnostic Trouble Codes that may have been set in any modules during the reprogramming process are cleared using the wiTECH application.

Required Tools and Parts

The primary tool required for this service is a wiTECH or Equivalent scan tool, which is necessary for diagnostic procedures and software reprogramming.

Warranty Information

This repair, outlined in TSB 18-006-25, is reimbursable within the provisions of the vehicle's warranty. The specific claims data for this operation is:

• Labor Operation No: 18-19-06-BQ
• Labor Description: Module, Powertrain Control (PCM) - Reprogram (0 - Introduction)
• Skill Category: 1 - Engine Repair and Performance
• Labor Time: 0.7 Hours
• Failure Code: CC (Customer Concern)

Dealers are instructed to use failure code CC when the customer's concern matches the symptoms identified in this Technical Service Bulletin. When using this failure code, the 3C's (customer's concern, cause, and correction) must be provided for processing the Technical Service Bulletin flash/reprogramming conditions.

NHTSA ID: 10260461