Code Enable Criteria

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

Following conditions must be met for DTC diagnostic test to run:

Ignition voltage is between 11 and 16 volts.
Intake air temperature is more than 37°F (3°C).
Desired EGR position is 3 percent or more.
Difference of EGR pintle position between current and learned zero is more than 30 percent for more than 5 seconds and exists 3 times.