HO2S Circuit Monitor
OPERATION (1 OF 2)
| DTC | P0137 |
| Monitor execution | Continuous |
| Monitoring duration | 25 sec. |
OPERATION (2 OF 2)
| DTC | P0138 |
| Monitor execution | Continuous |
| Monitoring duration | 5 sec. |
ENABLE CONDITIONS
| Parameter | Min. | Max. |
|---|---|---|
| P0137 | ||
| Not fuel shut off | 5 sec. | - |
| HO2S heater | No DTC (P0037, P0038) | |
| P0138 | ||
| HO2S heater on | 150 sec. | - |
| HO2S heater | No DTC (P0037, P0038) | |
TYPICAL MALFUNCTION THRESHOLDS
| P0137: HO2S voltage < 20 mV |
| P0138: HO2S voltage > 1.2 V |