2024 Alfa Romeo Stelvio MIL P0606 TSB

Symptoms

Owners of affected 2024 Alfa Romeo Stelvio vehicles may experience a Malfunction Indicator Lamp (MIL) illumination on the dashboard. This is typically accompanied by the Diagnostic Trouble Code (DTC) P0606. Additionally, the vehicle might enter "limp-in mode," which limits engine power and speed to prevent further damage. This issue specifically affects 2024 Alfa Romeo Stelvio models equipped with the 2.9L V6 Twin Turbo PDI Engine (Sales Code EEC).

Fault Codes / DTCs

The primary diagnostic trouble code associated with this issue is:

Diagnosis / Trigger Conditions

The root cause of the 2024 Alfa Romeo Stelvio MIL P0606 issue is identified as Powertrain Control Module (PCM) software. Technicians will use a wiTECH Scan Tool along with appropriate diagnostic procedures from DealerCONNECT/Service Library to verify related systems. The repair is applicable if the vehicle exhibits MIL illumination and the DTC P0606 is present. If a vehicle's VIN is listed on the Rapid Service Update (RSU) VIN list, the repair should be performed. Even if not on the list, if the symptoms are present, the repair procedure is still applicable.

Repair Procedure Summary

Technical Service Bulletin (TSB) 18-006-25 REV. A outlines the steps to resolve the 2024 Alfa Romeo Stelvio MIL P0606. The bulletin involves inspecting and potentially reprogramming the Powertrain Control Module (PCM) with the latest available software. This vehicle has two Engine Control Modules (ECMs), referred to as Primary and Secondary PCMs, both of which must be updated.

The repair process includes:

1. Verifying if the vehicle is on the RSU VIN list.
2. Checking if the PCM already has the latest software installed. If it does, the bulletin is considered complete.
3. Reprogramming the Primary PCM with the latest software using the wiTECH Diagnostic Application.
4. Reprogramming the Secondary PCM with the latest software.
5. Performing the "Control unit reprogramming" routine in wiTECH, located in the ECM "Misc. Functions" menu tab.
6. Performing the "Oil level sensor replacement" routine in wiTECH, also in the ECM2 “Misc. Functions” menu tab.
7. Clearing any Diagnostic Trouble Codes (DTCs) that may have been set in any modules during the reprogramming process.

Required Tools or Parts

To perform this repair, technicians will need a wiTECH or equivalent diagnostic tool. A battery charger is also required to maintain stable voltage during the reprogramming process.

Important Warnings

• Install a battery charger to ensure battery voltage does not drop below 13.2 volts. Do not allow the charging voltage to climb above 13.5 volts during the flash process.
• Before performing specific post-reprogramming steps, the ignition must be in the on position, the engine off, and the engine temperature must be above 80 °C (176 °F).

Owner Action

If your 2024 Alfa Romeo Stelvio is experiencing a Malfunction Indicator Lamp (MIL) illumination, displaying the DTC P0606, or entering "limp-in mode," it is recommended to contact your authorized Alfa Romeo dealer. This issue is addressed by Technical Service Bulletin (TSB) 18-006-25 REV. A, which has also been released as Rapid Service Update (RSU) 25-040. The repair involves a software update to the Powertrain Control Module (PCM) and is reimbursable within the provisions of your vehicle's warranty.

Source: NHTSA ID 11015885