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.
- Engine speed is more than 40 RPM.
- Main relay voltage is 8-18 volts.
DTC sets when HO2S bank 1, sensor 1 feedback voltage is 2.6-4.6 volts (ECM pull-up voltage) for more than 0.5 second when heater is commanded off.