When Subaru xv braked, the idle speed became lower.

When Subaru xv braked, the idle speed became lower. I think the throttle is dirty.

Just clean the throttle.

Due to carbon deposition, the throttle will affect the opening and air intake, which will make the engine speed fluctuate after the car is started, which is very unstable and accompanied by strong jitter.

The throttle valve has serious oil storage or carbon deposition, including unclean air intake, which makes it difficult to start the car in cold weather. When the throttle is dirty, it needs to be cleaned, and the throttle cleaning itself is also a routine maintenance item.