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:

No Engine Coolant Temperature (ECT) sensor, Throttle Position (TP) sensor, Intake Air Temperature (IAT) sensor or Manifold Absolute Pressure (MAP) sensor DTCs are stored.
No Fuel Vapor Pressure (FVP) sensor DTCs are stored.
Barometer (BARO) pressure is more than 70 kPa.
Fuel level is between 40-80 percent.
Throttle angle less than 3 percent.
Engine speed is less than 1200 RPM.
Vehicle speed is less than 5 mph.
A vacuum decay condition, indicating a very small leak, is detected during diagnostic test.