Detection Condition
WARNING: This page is about a different car, the 2003 Mazda MPV and 2002 Mazda MPV. However, it is still accessible from the selected car via links, so may be relevant.
PCM monitors input voltage from EGR boost sensor during monitoring conditions. If input voltage is less than .2 volt, DTC is set. This is a continuous monitor. MIL is illuminated if PCM detects malfunction during first drive cycle.