Hey everyone!

I have a 2013 Lancer SE (10th-year edition) and have been getting my TCS light on (active) and TCS light off after driving for around 10-15 minutes. I also lose engine power when this happens, but it is fixed when brakes are applied (lights stay on). I took it to the dealership and was told the brake switch needed to be lubricated. Tech did this, and off I went. Lights came back on. I went back in, and the tech did a quick look - it's either a faulty switch or the master, a switch is $40, but the master is $3700...I don't recall a master being that expensive? Is there another part he could've been talking about...also, has anyone experienced this problem? If so, what was your solution?

Here is a picture to better explain my dash. TPS light on due to no sensors in winter tires



Thank you!