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.
- EVAP vacuum switch state equals high vacuum for a period greater than 4 seconds.
- Purge solenoid diagnostic vacuum switch DTC is not set.
- No IAC DTCs are set.
- No MAP sensor DTCs are set.
- No TP sensor DTCs are set.
- No EGR DTCs are set.
- BARO is greater than 75 kPa.
- Engine coolant temperature is less than 230°F (110°C).
- Intake air temperature is less than 194°F (90°C).
- Difference between engine coolant temperature and intake air temperature is less than 194°F (90°C).
- Purge DC is less than or equal to 5 percent.
- Manifold absolute pressure is greater than 20 kPa but less than 80 kPa.
- Throttle positions is greater than 5 percent but less than 60 percent.
- Engine speed is greater than 800 RPM but less than 3000 RPM.