Checking the condition of the EGR valve (Nissan Maxima A32)

1. The EGR valve is bolted to the rear cylinder head on the transmission side. The most common cause of EGR system malfunction is a stuck or oxidized EGR valve.



2. On a cold engine (so as not to get burned) reach underneath the EGR valve and press on its diaphragm. The diaphragm should move even with moderate pressure.

3. If the diaphragm only starts to move when pressed very hard, or does not move at all, replace the EGR valve. If you are not sure about the condition of the valve, compare it with a new one or a known good one.

4. Detailed information on the operation of the EGR system is given in Chapter Engine management systems.

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