DTC Parameters

WARNING: This page is about a different car, the 2002 Saturn Vue. 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, HO2S1, ECM 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. Condition must exist for more than 15 seconds.