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 EGR, HO2S (response, transition, open, low voltage, no activity). MAF sensor, TPS, MAP sensor, IAT sensor, EVAP system (canister purge), fuel injector circuit or misfire DTCs are stored.
Engine coolant temperature is between 43°F (6°C) and 221°F (105°C).
Intake air temperature is between -40°F (-40°C) and 248°F (120°C).
Manifold absolute pressure is between 24 and 99 kPa.
Throttle angle is steady between 3 and 95 percent.
Vehicle speed is less than 85 MPH.
Engine speed is between 400 and 6000 RPM.
Barometric pressure is 72.5 kPa or more.
Mass air flow is between 2 and 200 grams/sec.
Ignition system is more than 9.5 volts.
Fuel system is in closed loop.
Canister purge duty cycle is more than zero percent if ON.