First thank you for reading my article.
I'm the owner of 2008 S60 2.5T volvo with 154,081 km in Korea.

I took this car as used car from dealer on January, 2019.
It was 126,725km and having problem with steering angle sensor(Clockspring sensor).

And i noticed that problem, so it was no problem.

But there is big issue on my car related to BRAKE.
It happened when i drive more than 10 minutes in downtown(as city driving)
When the brakes are heated, they occur.
The situation that i shifted gear from first to second, the car does not move forward, but comes forward with a shock after a few seconds.
There is no oil leak on my brake. One mechanic told me he thoughts it could be transmission trouble.
But If it's a transmission problem, it always going to have this problem. But my gear shift is doing very well at high speed.

It is really stressful. So here is what i changed about.

1. Replace Continuous Velocity Joint.
2. Change the brake fluid
3. Change the coolant
4. Change Front and Rear brake pad and Rotors(discs)
5. Replace Lower control arm
6. Replace Engine upper mount
7. Change clock spring sensor
8. Replace Ignition plug
9. Replace tie rod ends
10. Change Fuel filter
11. Replace the brake pedal position sensor & Brake pedal switch
12. Change the transmission fluid
13. And again change the brake fluid
14. Change Master cylinder and reservoir
15. Change the brake hose

Here is what i repair my car.
Yesterday, There was error code, P0573 and P2131.

P0573 was occurred before, but it happened again. I thought i solved the problem with changing brake sensor.
And P2131 mean it is related to Throttle position or Accelerator pedal position sensor.

I really want to know what is problem with my car. I don't have male friends, so it is hard to solve the problem alone as woman.
I checked the brake caliper, but it didn't bind. And there is no trace.

And now i am doubtful about inside of caliper. Should i overhaul my caliper?
Or does anyone know about this problem? Please help me.

I am not good at English, but thank you for reading this.