Test Description
WARNING: This page is about a different car, the 2003 Cadillac Seville and 2003 Cadillac DeVille. However, it is still accessible from the selected car via links, so may be relevant.
The number below refers to the step number on the diagnostic table.
- 3
The HO2S 2 should be allowed to cool before performing this test. The HO2S 2 is cool enough if the voltage output is stable at bias or, about 450 mV. If the HO2S 2 heater is functioning, the signal voltage will gradually decrease as the sensor element warms. If the heater is not functioning, the HO2S 2 signal will remain near the 450 mV bias voltage.