Table 1 shows one common vehicle speed control related problems of the 2020 Volvo S60.
| Problem Category | Number of Problems |
|---|---|
| Vehicle Speed Control problems |
On two separate occasions in the past two months June 6 and Aug. 15, this vehicle experienced a severe unintended engine surge / unintended acceleration event while at a complete stop with my foot firmly on the brake. On both occasions, the engine rpms spiked above 1,000 rpm, forcing the vehicle to pull heavily against the brakes as if trying to race forward into the intersection. On the most recent event (Aug. 15) when stopping at a red light it appeared that the supercharger kicked in, pulling against the brakes. Six or eight pedestrians were crossing directly in front of the vehicle. If I had taken my foot of the brake I would have hit them. 1. June 12, 2026 service visit (ro #192480, attached): following the June 6 incident, the vehicle was brought to beyer Volvo cars falls church, va. The repair order explicitly notes:"tech found the front sunroof drains to have clogged with dirt/debris and the floorboard to be full of water. ""interior was removed to dry out carpets and the sunroof drains were cleared. " clogged sunroof drains cause water ingress down the a pillar. 2. Diagnostic code & part replacement: during this visit, fault code 161615 was retrieved. The technician noted "unable to duplicate the problem at this time" regarding the engine flare, and no physical inspection or remediation of the flooded wiring harnesses or module connectors beneath the carpet was performed. This same a6 electrical code 161615 was noted on a previous service on 25 Sep. 2025, (ro#184284, attached). There is clear precedent with NHTSA recall 22v-288 (of a different Volvo model, the xc40), where water intrusion into Volvo wiring harnesses caused corrosion and unintended acceleration. Given that my passenger footwell flooded prior to the engine surge, the can bus harness and floor connectors beneath that carpet must undergo a full electrical continuity and corrosion inspection, not just a surface drying. I am requesting further service by the dealer.
The contact owns a 2020 Volvo S60. The contact stated that while at a stop light, the vehicle erroneously drove forward and crashed into a second vehicle. The contact indicate that during the crash the collision avoidance feature did not activate. No injuries were reported. A police report was taken at the scene and the vehicle was towed away. The cause of the failure was not determined. The manufacturer and local dealer were notified of the incident. The failure mileage was 16,000.