Forward Collision Avoidance Related Problems of the 2018 Volvo S90

Warnings problem

Issue 1 – Volvo on call / vcm "service required" message: my vehicle has displayed a persistent "Volvo on call service required" error message in the driver information module (dim) for over one year. This is directly covered • Volvo technical journal tj 36916. 1. 0 (NHTSA mc-10253788), issued April 2024 • fault code: vcm-u105000 (vehicle communication module) • TSB explicitly covers 2018 S90 vehicles • the TSB states the required software packages are free of charge I contacted Volvo cars USA at [xxx] , who acknowledged the issue and arranged a complimentary diagnostic and fix with the manasquan dealer. But, the dealer would not perform the diagnostic at no charge, leaving me unable to confirm the fault code or proceed with the TSB-specified remedy without paying out of pocket. I have had this unresolved warning message for over one year now. The dealer told me that if I did not pay for the repair my car could lose power and stop suddenly. Issue 2 – park assist system false alerts: my park assist system sensors generate false proximity warnings for objects more than 20 feet away — far beyond the system's normal detection range. Cleaning the sensors did not resolve the issue. This is directly covered • Volvo technical journal tj 31558. 8. 0 (NHTSA 10161789), issued April 2019 • root cause: water ingress into park assist sensors and connectors due to a defective splice in the cable harness • Volvo introduced a harness splice correction in production starting June 2018 — meaning vehicles built before that correction may contain the defective harness • TSB covers 2016–2019 Volvo vehicles a malfunctioning park assist system is a direct safety concern — drivers rely on accurate proximity alerts when maneuvering, and persistent false alerts undermine confidence in the system and may cause drivers to disregard genuine warnings. Information redacted pursuant to the freedom of information act (foia), 5 u. S. C. 552(b)(6).