When you see "Volvo Propulsion System Service Required," watch for these signs:
The XC90’s 8-speed automatic transmission (TG-81SC) has known solenoid failures. If the transmission cannot shift properly, the propulsion system alerts the driver. volvo propulsion system service required xc90
Based on Volvo technical service bulletins (TSBs) and real-world mechanic reports, here are the top reasons this appears on an XC90 (2016–present): When you see "Volvo Propulsion System Service Required,"
For XC90s equipped with the Aisin Warner transmissions (common in T5, T6, and older models), issues with the mechatronic unit are a frequent culprit. This unit houses the transmission's brain and the solenoids that control fluid flow. and older models)