Primary HO2S Circuit Monitor
WARNING: This page is about a different car, the 2006 Suzuki XL-7. However, it is still accessible from the selected car via links, so may be relevant.
Operation
PRIMARY HO2S CIRCUIT MONITOR OPERATION
| DTCs | P0131 (for bank 1) / P0151 (for bank 2) |
| Monitor execution | Continuous |
| Sensors / components | OK IAT, ECT, Barometric pressure, MAF, Primary HO2S, Primary HO2S heater |
| Monitoring Duration | 30 s |
PRIMARY HO2S CIRCUIT MONITOR OPERATION
| DTCs | P0132 (for bank 1) / P0152 (for bank 2) |
| Monitor execution | Continuous |
| Sensors / components OK | Primary HO2S heater |
| Monitoring Duration | 3 s |
Enable conditions
PRIMARY HO2S CIRCUIT MONITOR ENABLE CONDITIONS
| Parameter | Minimum | Maximum |
|---|---|---|
| P0131, P0151 | ||
| F/C mode | Off | |
| Fuel feedback mode | On | |
| Time from engine start | 2 s | |
| ECT | 110 (230) °C (°F) | |
| IAT | -8 (17.6) °C (°F) | |
| Primary HO2S heater operation time | 24 s | |
| Barometric pressure | 74.5 kPa | |
| Misfire | No DTC | |
| EGR system monitor | No DTC | |
| Fuel system monitor | No DTC | |
| P0132, P0152 | ||
| Battery voltage | 11 V | 16 V |
Typical malfunction thresholds
PRIMARY HO2S CIRCUIT MONITOR TYPICAL MALFUNCTION THRESHOLDS
| P0131, P0151 |
| Low voltage Pull-up voltage ≥ 4.5 V |
| O2S voltage < 0.05 V |
| P0132, P0152 |
| High voltage HO2S voltage > 1.2 V |