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:

Engine running.
No Intake Air Temperature (IAT), Engine Coolant Temperature (ECT) and Mass Air Flow (MAF) DTCs are stored.
No Vehicle Speed Sensor (VSS) DTC are stored.
Warm case: (Ambient temperature is between 50°F and 128°F.) Time for coolant to reach stabilized closed loop value is less than 239 seconds.
Cold case: (Ambient temperature is between 20°F and 50°F.) Time for coolant to reach stabilized thermostat regulation temperature is more than 263 seconds.