Conditions for Setting the DTC

WARNING: This page is about a different car, the 2004 Pontiac Vibe. However, it is still accessible from the selected car via links, so may be relevant.

The HO2S 1 heater is commanded ON for more than 0.2 seconds.
The HO2S 1 heater current is less than 0.26 amps.
The condition exists for more than 0.3 seconds.