Purge Valve (PCS)
From eCtune
Purge Valve (PCS)
Purge
valve(PCS) Settings
Disable PCS: Disables the Purge valve function in the ECU.
Invert PCS: Some obd2 cars have their PCS
signal inverted. You may need to invert the output otherwise it
may cause the PCS to stay open causing a vaccum leak.