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 TP sensor DTCs are set.
No MAF DTCs are set.
No IC control DTCs are set.
No VSS DTCs are set.
No crankshaft position sensor DTCs are set.
Rough road condition is not detected.
ECT is greater than or equal to 19°F (-7°C).
Engine speed is 600-5600 RPM.
System voltage is 9-16 volts.
Positive throttle position change is less than 4.9 percent for 100 milliseconds.
Negative throttle position change is less than 2.9 percent for 100 milliseconds.
Misfire is detected.