Diagnostic Aids
WARNING: This page is about a different car, the 2009 Saturn Vue. However, it is still accessible from the selected car via links, so may be relevant.
- The front wide band sensors do not toggle or switch like a switching HO2S. The front HO2S signal will be relatively stable for an idling engine.
- The following table illustrates the typical voltages for the HO2S circuits:
| HO2S Circuit | Voltage |
|---|---|
|
|
| Heater Control | 4.6-5.2 V |
| Heater Supply Voltage | B+ |
| Reference Voltage | 2.6-3.1 V |
| Low Reference | 2.2-2.7 V |
| Pump Current | 2-3 V |
| Input Pump Current | 2-3 V |