Code Enable Criteria

WARNING: This page is about a different car, the 2001 Saturn LW200, 2001 Saturn L200, and 2001 Saturn L100. However, it is still accessible from the selected car via links, so may be relevant.

EVAP vent solenoid is commanded on (closed).
EVAP purge solenoid is commanded off (closed).
Engine is running.
Fuel level is 15-85 percent.
BARO more than 75 kPa.
ECT and IAT are 39-86°F (4-30°C) at engine start-up.
ECT and IAT are within 14°F (8°C) of each other.
Throttle angle 7-35 percent.
Vehicle speed less than 70 MPH.
No ECT, fuel tank pressure, IAT, MAP, O2S1, PCM internal fault, TP or VSS DTCs are set.

DTC sets when vacuum decay is more than 0.02-0.10 volts per second at fuel pressure sensor for more than 15 seconds. 0.02 volt is with a low fuel level and 0.10 volt is with a high fuel level.