Primary HO2S 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 MONITOR OPERATION
| DTCs | P0133 (for bank 1) / P0153 (for bank 2) / P2A00 (for bank 1) / P2A03 (for bank 2) |
| Monitor execution | Once per driving cycle |
| Sensors / components OK | ECT, MAP, TP, IAT, Barometric pressure, MAF, IAC system, Back-up power, Primary /Secondary HO2S, Primary / Secondary HO2S heater |
| Monitoring Duration | 30 s |
PRIMARY HO2S MONITOR OPERATION
| DTCs | P0134 (for bank 1), P0154 (for bank 2) |
| Monitor execution | Continuous |
| Sensors / components OK | MAF, IAT, Barometric pressure, ECT, Primary HO2, Primary HO2S heater |
| Monitoring Duration | 30 s (phase 1), 60 s (phase 2) |
Enable conditions
PRIMARY HO2S MONITOR ENABLE CONDITIONS
| Parameter | Minimum | Maximum |
|---|---|---|
| P0133 (Phase 1, Phase 2), P0153 (Phase 1, Phase 2), P2A00 (Phase 1, Phase 2), P2A03 (Phase 1, Phase 2) | ||
| Engine coolant temp. | 110 (230) °C (°F) | |
| Engine speed (before monitoring) | 1688 rpm | |
| Calculated Load Value (before monitoring) | 31% | |
| Vehicle speed (before monitoring) | 32 (20) km/h (MPH) | |
| Throttle angle | 1.2% (0.98 deg) | |
| Vehicle speed | 3.2 (2) km/h (mph) | |
| Primary HO2S heater operation time | 10 sec | |
| IAT | -8 (17.6) °C (°F) | |
| Barometric pressure | 74.5 kPa | |
| F/C mode | Off | |
| Enrichment mode | Off | |
| Fuel feedback mode | On | |
| Misfire | No DTC | |
| EGR system monitor | No DTC | |
| Fuel system monitor | No DTC | |
| P0134 (Phase 1, Phase 2), P0154 (Phase 1, Phase 2) | ||
| Phase 1 | ||
| IAT | -8 (17.6) °C (°F) | |
| Barometric pressure | 74.5kPa | |
| Engine coolant temp. | 110 (230) °C (°F) | |
| Primary HO2S heater operation time | 24 s | |
| Time from engine start | 2 s | |
| Fuel feedback mode | On | |
| F/C mode | Off | |
| Misfire | No DTC | |
| EGR system monitor | No DTC | |
| Fuel system monitor | No DTC | |
| Phase 2 | ||
| Enrichment mode | Off | |
| Fuel feedback mode | On | |
| ECT | 110 (230) °C (°F) | |
| IAT | -8 (17.6) °C (°F) | |
| Barometric pressure | 74.5 kPa | |
| Misfire | No DTC | |
Typical malfunction thresholds
PRIMARY HO2S MONITOR TYPICAL MALFUNCTION THRESHOLDS
| P0133 (Phase 1), P0153 (Phase 1) |
| Lean to rich time average > 0.42 s |
| Rich to lean time average > 0.52 s |
| P0133 (Phase 2), P0153 (Phase 2) |
| HO2S switching cycle average during 30 s > 2.5 s |
| P2A00 (Phase 1), P2A03 (Phase 1) |
| Max. voltage average < 0.6 V |
| Min. voltage average < 0.3 V |
| P2A00 (Phase 2), P2A03 (Phase 2) |
| Max. voltage average < 0.74 V |
| Min. voltage average < 0.34 V |
| P0134 (Phase 1), P0154 (Phase 1) |
| HO2S voltage < 0.45 V |
| P0134 (Phase 2), P0154 (Phase 2) |
| HO2S voltage ≥ 0.45 V |