Code U0107 on the 2020 Subaru Outback indicates lost communication with a secondary throttle actuator control module. On turbocharged Outback models with the 2.4L XT engine, this may relate to the bypass valve or secondary air management systems that work alongside the primary electronic throttle.
Secondary Throttle Systems
Turbocharged engines often use secondary throttle or bypass valve systems to manage boost pressure, air recirculation, and turbo response. The 2.4L XT engine in the Outback XT uses electronic controls for these systems. Communication loss with these controllers affects turbo operation and engine management.
Performance Impact
With U0107 active, you may notice reduced turbo boost, slower throttle response, or the engine entering a protective mode. The check engine light illuminates, and the vehicle may have limited power. On non-turbo models, this code may relate to other secondary air or emissions control systems.
Diagnostic Direction
Identify which system uses the secondary throttle actuator in your specific Outback configuration. Check the module connector for damage - these are often located in high-heat areas near the turbo or intake manifold. Verify power, ground, and CAN communication. Heat damage to wiring harnesses is common in these locations.
Repair Path
Address wiring and connector issues before replacing modules. Heat shielding may need to be added or repaired if wiring damage is found. Module replacement requires Subaru Select Monitor for programming and any necessary relearn procedures.