2022 Alfa Romeo Stelvio PCM Update for MIL & DTCs

Owners of the 2022 Alfa Romeo Stelvio equipped with the 2.9L V6 Twin-TurboPDI Engine W/ESS (Sales Code EEC) may encounter a Malfunction Indicator Lamp (MIL) illumination on their dashboard, along with various Diagnostic Trouble Codes (DTCs). This issue, which can also lead to the vehicle entering "limp mode," is addressed by Technical Service Bulletin (TSB) 18-013-25. This bulletin, issued on March 8, 2025, supersedes TSB 18-043-23 dated July 9, 2024, and provides a software update for the Powertrain Control Module (PCM) to correct these conditions.

Symptoms

If your 2022 Alfa Romeo Stelvio is affected, you will likely observe a "Malfunction Indicator Lamp (MIL) illumination" on the instrument cluster. In some cases, the vehicle may also enter "limp mode," which restricts engine power and speed to prevent further damage. These symptoms are typically accompanied by one or more specific Diagnostic Trouble Codes (DTCs).

Fault Codes / DTCs

The following Diagnostic Trouble Codes (DTCs) may be stored in the vehicle's system, indicating the need for the PCM software update described in TSB 18-013-25:

Cause

The root cause of these issues, including the Malfunction Indicator Lamp (MIL) illumination and the associated DTCs in the 2022 Alfa Romeo Stelvio, has been identified as a software anomaly within the Powertrain Control Module (PCM).

Important Warnings

Owners should be aware of a critical step in the repair process: "Failure to update the TCM module following an PCM software update may result in vehicle malfunctions." This means that simply updating the PCM is not sufficient; the Transmission Control Module (TCM) must also receive its latest software update to ensure proper vehicle operation and prevent further issues.

Repair Procedure Summary

The repair for the 2022 Alfa Romeo Stelvio PCM update involves reprogramming both the Primary and Secondary Engine Control Modules (ECMs), which are collectively known as Powertrain Control Modules (PCMs), with the latest available software. The Primary ECM must be programmed first, followed by the Secondary ECM2.

Technicians are instructed to connect a battery charger to maintain voltage between 13.2 and 13.5 volts throughout the flash process. If the programming process is interrupted, it must be restarted. After updating the PCMs, the Transmission Control Module (TCM) must also be updated to its latest software. The procedure also includes performing specific control unit reprogramming routines and an oil level sensor replacement routine using the wiTECH diagnostic tool. Finally, any Diagnostic Trouble Codes (DTCs) that may have been set during the reprogramming process are cleared.

Required Tools or Parts

The primary tool required for this service is a wiTECH diagnostic scan tool or an equivalent device capable of performing module reprogramming. A battery charger is also necessary to maintain stable voltage during the software update process.

Owner Action

If your 2022 Alfa Romeo Stelvio is exhibiting a Malfunction Indicator Lamp (MIL) illumination, entering limp mode, or storing any of the listed DTCs, you should schedule an appointment with an authorized Alfa Romeo dealership. The dealer will perform the necessary software updates for the PCM and TCM as outlined in TSB 18-013-25. This repair is reimbursable under warranty provisions and typically takes approximately 0.7 hours of labor (Labor Operation No: 18-19-06-BQ).

Source: NHTSA ID: 11015528