Possible Causes

WARNING: This page is about a different car, the 2002 Nissan Xterra and 2002 Nissan Frontier. However, it is still accessible from the selected car via links, so may be relevant.

Malfunction is detected when EGRC-BPT valve does not operate properly. Possible causes are:

Defective EGRC-BPT valve.
Defective EGR valve.
Backpressure hose blockage or leak.
Defective Camshaft Position (CMP) sensor.
Plugged exhaust.
Missing orifice in hose between EGRC-BPT valve and EGRC solenoid valve.
Defective Mass Airflow (MAF) sensor.
Defective EGRC solenoid valve.

NOTE: Before proceeding, ensure ambient temperature is more than 41°F (5°C) and battery voltage is more than 11 volts at idle.