EGR Valve: Operation, Symptoms and Maintenance

The EGR valve plays a crucial role in the proper functioning of the engine, but tends to get dirty easily, especially in diesel engines. A malfunctioning EGR is usually signalled by the yellow engine fault light. However, problems can be noticed by paying attention to these symptoms:

• Engine starting problems. Starting can be difficult when the EGR valve is not functioning properly.

• Excessive smoke emission from the exhaust under acceleration. If you notice a significant increase in exhaust smoke during acceleration, it could be a sign of EGR malfunction.

• Increased consumption. Inefficient EGR valve can lead to increased fuel consumption.

• Reduced power at low revs. If the engine lacks power at lower revs, it could be related to problems with the EGR valve.

In severe cases, the EGR valve may become clogged and cause progressive engine damage. When it remains stuck in the open position, the engine receives a reduced amount of fresh air, leading to combustion problems and wear on internal parts. If, on the other hand, it remains closed, harmful emissions increase, damaging air quality.

Proper maintenance of the EGR valve is essential to ensure an efficient engine and to reduce pollutant emissions. This is especially critical for those who mainly drive in cities, where EGR tends to get dirty more quickly. Here are some tips for prolonging the life of the valve:

• It uses specific additives. Additives added to the fuel can prevent and remove impurities that accumulate inside the EGR valve.

• Change filters and engine oil regularly. Regular engine maintenance, including filter and oil changes, will help keep the EGR valve in good condition.

However, for a complete check and proper maintenance, it is advisable to consult an experienced mechanic. The mechanic will disassemble the EGR valve and subject it to the necessary care, including possible replacement, to ensure that the engine runs properly and the environment is respected. Do not overlook the importance of the health of your EGR valve, as it is crucial for both the proper functioning of your vehicle and the health of the environment.