2023 Alfa Romeo Stelvio P0606 MIL Illumination TSB

Owners of the 2023 Alfa Romeo Stelvio equipped with the 2.9L V6 Twin Turbo PDI Engine (Sales Code EEC) may experience a Malfunction Indicator Lamp (MIL) illumination accompanied by Diagnostic Trouble Code (DTC) P0606. This condition, related to the control module processor, can also lead to the vehicle entering a "limp-in mode," which restricts engine power and speed. Technical Service Bulletin (TSB) 18-003-25 addresses this specific issue by providing a software update for the Powertrain Control Module (PCM).

Symptoms

If your 2023 Alfa Romeo Stelvio is affected by this issue, you will typically observe the following:

• "Malfunction Indicator Lamp (MIL) illumination" on your dashboard.
• The vehicle may enter "limp-in mode," which limits performance to protect the engine.

Fault Codes / DTCs

This TSB specifically addresses the following Diagnostic Trouble Code:

• P0606 - Control Module Processor: This code indicates an internal fault within the Powertrain Control Module (PCM).

Diagnosis

Before proceeding with the repair, technicians will use a wiTECH scan tool to verify all related systems are functioning correctly. If any other DTCs or symptoms are present beyond those listed in TSB 18-003-25, those issues must be addressed and repaired first. The presence of the "Malfunction Indicator Lamp (MIL) illumination" and DTC P0606 confirms the need for this bulletin's repair procedure.

Important Warnings for the Repair Process

Owners should be aware of specific instructions for technicians during this software update to ensure a successful repair:

• Battery Voltage: A battery charger must be installed to maintain battery voltage between 13.2 and 13.5 volts throughout the flash process. Allowing the voltage to drop below 13.2 volts or climb above 13.5 volts can cause issues.
• Interruption: If the flash process is interrupted or aborted for any reason, it must be restarted from the beginning.
• Engine Temperature: Before performing certain steps, the ignition must be in the ON position with the engine OFF, and the engine temperature must be above 80 °C (176 °F).

Repair Procedure Summary

The resolution for the 2023 Alfa Romeo Stelvio P0606 issue involves updating the Powertrain Control Module (PCM) software. This vehicle is equipped with two Engine Control Modules (ECMs), referred to as Primary and Secondary PCMs, both of which require updating. The Primary PCM is programmed first, followed by the Secondary PCM (ECM2).

The general steps for the repair outlined in TSB 18-003-25 are:

1. Reprogram Primary PCM: The Primary PCM is updated with the latest available software using the wiTECH Diagnostic Application.
2. Reprogram Secondary PCM: The Secondary PCM is then updated with the latest available software using the wiTECH Diagnostic Application.
3. Control Unit Reprogramming Routine (ECM): Perform the "Control unit reprogramming" routine located in the ECM's "Misc. Functions" menu tab using wiTECH.
4. Control Unit Reprogramming Routine (ECM2): Perform the "Control unit reprogramming" routine located in the ECM2's "Misc. Functions" menu tab using wiTECH.
5. Oil Level Sensor Replacement Routine: Perform the "Oil level sensor replacement" routine located in the ECM2's "Misc. Functions" menu tab. This step requires the ignition to be on, engine off, and engine temperature above 80 °C (176 °F).
6. Clear DTCs: Any Diagnostic Trouble Codes that may have been set in other modules due to the reprogramming process will be cleared automatically by the wiTECH application.

This entire procedure, identified by Labor Operation No. 18-19-06-BQ, is estimated to take 0.7 hours of labor.

Required Tools

Technicians will need a wiTECH or equivalent diagnostic scan tool to perform the software updates and routines described in TSB 18-003-25.

Owner Action

If you own a 2023 Alfa Romeo Stelvio and are experiencing a "Malfunction Indicator Lamp (MIL) illumination" or your vehicle entering "limp-in mode" with a confirmed DTC P0606, you should schedule an appointment with your authorized Alfa Romeo dealer. The dealer will perform the necessary PCM software update under warranty provisions, using failure code CC (Customer Concern).

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Source: NHTSA ID: 11014159