EGR valve defective (exhaust gas recirculation)
Exhaust gas recirculation reduces pollutants by cooling combustion.
Costs
Every car issue can be caused by different things. Here are the most common ones
max.
Potential Causes
- Spare parts
- Work time
max.
Potential Causes
- Spare parts
- Work time
max.
Potential Causes
- Spare parts
- Work time
max.
Potential Causes
- Spare parts
- Work time
Unlock the costs
Simply enter your email for free to unlock the costs.
Attention! Critical error!
If the EGR valve gets stuck in the open position it can happen that the engine stutters or does not start at all.
Discussions
User of our Carly Community asked the following questions regarding that fault:
Smart Mechanic
Here, you’ll find the best information on your specific car issue – directly from our experienced mechanics with years of expertise.
Details
Probability
Based on the values and symptoms you have entered, a crude estimation of the probability of this problem can be made
HIGH
Typical consequences
If this defect is detected, it may lead to the following problems:
- Engine damage
- Failure of the exhaust emission test (Failure to pass the exhaust emission test)
Function of EGR system
The engine control unit is the heart of modern engines. It controls injection and, in gasoline engines, ignition. It uses sensor signals and parameters to provide precise engine control. Injection valves or injectors, solenoid or piezo injectors, ensure an exact injection quantity.
Due to low manufacturing tolerances, injectors have different resistance values and "characteristics". For this reason, each injector is marked with a combination of numbers and letters that must be taught in when the injector is changed. This is done to compensate for manufacturing tolerances (quantity drift compensations). This ensures clean and smooth engine running.