| DTC Strategy |
Case 1 |
|
- Poor connector connection
- Short/open in upstream O2 sensor signal circuit
- Defected upstream O2 sensor
|
| Case 2 |
|
| Enable Condition |
Case 1 |
- Dew point end detected
- Fuel feedback control active
- Battery voltage is higher than 10.7V
- Exhaust gas temperature is at between 1112°F (600°C) and 1652°F (900°C)
- No upstream O2 sensor heater error
|
| Case 2 |
- Dew point end detected
- Fuel feedback control active
- Battery voltage is higher than 10.7V
- Exhaust gas temperature (model) is lower than 1652°F (900°C)
- No upstream O2 sensor heater error
|
| Threshold Value |
Case 1 |
- Internal resistance is higher than 40kΩ
|
| Case 2 |
- Average of loaded voltage is higher than 2.8V
|
| Diagnostic Time |
|
| MIL ON Condition |
|