3 warning lights came on at once

Hello, the brake assist and stability track lights are likely related, the power steering light is a little surprising. However, all components share some of the same data, so it is possible that a related concern affects all systems. In all cases, diagnostic testing is required to find out what is going on. My first thought is that maybe you have low system voltage from your electrical system. A battery that is too low in charge or a charging system that is not doing its job properly can cause multiple low-voltage codes in multiple modules. It will be important to perform needed testing overall - testing the affected modules first, then determining what is likely a common root cause for the problems. Use this link to find some shops near you that can help with your concern: www.repairpal.com/repair-shops