Nissan 14710-1W601 Exhaust Gas RECIRCULATION Valve

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The EGR valve is mostly located on the intake manifold. In most cases, a problem that occurs within the exhaust emission system is because of a stuck or faulty EGR valve. To prevent burns, press on the EGR valve diaphragm while the engine is cold. Pushing the diaphragm up into the housing should take some force but not too much. Removal of air filter housing may be necessary to access four-cylinder engines' EGR valves. If in doubt replace it with a new one. However, comparing free movement between your EGR and a new one could tell you how bad it is.

The EGR temperature sensor can be tested by submerging its tip in hot water and monitoring resistance changes. Resistance should decrease as temperature rises.

If the EGR valve is stuck or defective, it should be replaced with a new one.

The PCM controls the EGR system, operating the EGR control solenoid using vacuum signals.

The most common cause of problems in the emissions system is a stuck or defective EGR valve.

Component replacement involves removing and cleaning the EGR valve and mounting surfaces, removing deposits, and ensuring proper installation. For the EGR control solenoid, unplug electrical connectors, detach vacuum hoses, and remove the solenoid before reinstalling it. For the EGR temperature sensor, disconnect the electrical connector and unscrew the sensor before applying anti-seize to the threads and reinstalling it.