What does it mean if egr valve is stuck in closed performance position?

An EGR valve that is stuck in the closed performance position means that exhaust gas recirculation is not occurring, which can lead to increased emissions and reduced fuel efficiency. This can have a negative impact on the environment and cause your vehicle to fail emissions tests. Additionally, a stuck EGR valve can lead to engine problems such as reduced power, stalling, and rough idling.

Here are some of the possible causes of a stuck EGR valve:

* Carbon buildup: Over time, carbon deposits can build up on the EGR valve and prevent it from moving freely.

* Dirt and debris: Dirt and debris can also get into the EGR valve and cause it to stick.

* Faulty vacuum modulator: The vacuum modulator is responsible for controlling the EGR valve. If the vacuum modulator is faulty, it can cause the EGR valve to get stuck.

* Electrical problems: Electrical problems, such as a defective solenoid or wiring issue, can also cause the EGR valve to get stuck.

If you suspect that your EGR valve is stuck, you should have it inspected by a qualified mechanic. The mechanic will be able to determine the cause of the problem and repair it as needed.