September 30: LEMON manuals is back up on a temporary server! Slowness is possible
On Board Diagnosis Logic
WARNING: This page is about a different car, the 2005 Nissan Quest. However, it is still accessible from the selected car via links, so may be relevant.
If the EGR temperature sensor detects EGR flow under the condition that does not call for EGR, a high-flow malfunction is diagnosed.
Courtesy of NISSAN MOTOR CO., U.S.A.