DTC Will Set When The Following Conditions Are Present:

WARNING: This page is about a different car, the 1997 GMC Savana, 1997 Chevrolet Chevy Van, and 1997 Chevrolet Chevy Express. However, it is still accessible from the selected car via links, so may be relevant.

No IAC DTCs are set.
No HO2S DTCs are set.
No TP sensor DTCs are set.
No MAP sensor DTCs are set.
No EGR DTCs are set.
No EVAP DTCs are set.
No ECT sensor DTCs are set.
No MAF sensor DTCs are set.
No IAT sensor DTCs are set.
No VSS DTCs are set.
No system voltage DTCs are set.
No misfire DTCs are set.
Throttle position is less than 69.9 percent.
Engine speed is greater than 575 RPM but less than 4500 RPM.
BARO is greater than 70 kPa.
Engine coolant temperature is greater than 32°F (0°C) but less than 208°F (98°C).
Manifold absolute pressure is greater than 20 kPa but less than 98.9 kPa.
Intake air temperature is greater than -4°F (-20°C) but less than 158°F (70°C).
Airflow greater than 3 gm/s but less than 150 gm/s.
Vehicle speed is less than 85 MPH.
Average short term fuel trim is less than 115.