Conditions for Setting the DTC: P1A8D
WARNING: This page is about a different car, the 2007 Saturn Vue. However, it is still accessible from the selected car via links, so may be relevant.
Sensor output voltage less than 0.5 volt for 0.5 ms and 12-volt power supply - 12-volt output voltage is greater than 5 volts for 0.5 ms.