I believe the problem is in the EPS (Electronic Power Steering) system's sensor or software. According to Polestar, my car has the new fully electronic steering, whereas in the past it is only partial. Monitor by sensor(s), the EPS system has variable assist, which allows for more assistance as the speed of the Volvo decreases and less assistance from the EPS system during high speed situations. The nature of EPS versus traditional hydraulic power steering is that it is easily adjustable/tunable. According to Clemson University Vehicular Electronics Laboratory, one can alter the steering weight to radically improve steering feel and high speed stability. Furthermore, the ECU (Electronic Control Unit) evaluates: 1) the steering torque, 2) the steering direction being applied by the driver, 3) the road speed, 4) electric motor to provide the required amount of assistance in the correct direction. A poorly functional ECU can cause poor steering response. In certain instances, a simple reprogramming of software or replacement of torque sensor(s) is needed to increase precision safe steering.
The BMW enthusiasts that I know said that not too recently when BMW switched from Hydraulic assisted Power Steering (HPS) to EPS, BMW also struggled with customer complaints of poor steering handling for one or two model years only with their RWD, not the AWD. Then, BMW discovered how to resolved this issue after multiple EPS system software updates. I recently met an Audi enthusiast that said Audi/VW realized what BMW did and solved their high speed steering handling problem in their FWD, not AWD, by also updating their Electronic Power Steering module software.
After recently driving a loaner car, a 2015.5 S60 T5 Premier with also 19 in. wheel and sport suspension, on the same twisty freeway, the loaner has more accurate steering than my T6 Platinum no matter what steering mode my car was set. The chassis difference between my car from the loaner is the an additional supercharger and my EPS system has the feature to adjust between light, medium, or heavy, whereas the loaner is fixed.
Will connecting my car to VIDA assist in adjusting/tuning my car's EPS system to at the very least match the loaner car?
