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:

DTCs related to Throttle Position (TP) sensor, Mass Air Flow (MAF) sensor, Vehicle Speed Sensor (VSS) or Engine Coolant Temperature (ECT) sensor are not present.
Engine speed is between 600 and 6250 RPM.
System voltage is between 11.0 and 16.0 volts.
ECT sensor indicates an engine temperature between 19°F (-7°C) and 248°F (120°C).
Throttle angle is steady and throttle changes less than 2 percent per 125 milliseconds.