| DTC Strategy |
- Lean to Rich Response Rate check
|
- Poor Connector Connection
- Open or short in O2 sensor circuit
- Faulty Downstream O2 Sensor
|
| Enable Condition |
- Downstream O2 sensor tip temperature is 932°F (500°C) or heating duration is over 75s
- Downstream O2 sensor internal resistance is below 3000Ω
- Modeled catalyst temperature is over 752°F (400°C)
- Battery voltage is between 10 and 16V
- Mass air flow is between 2.78 and 69.4g/s
- Mass air flow integral after leaving fuel cut is over 100g
- Modeled exhaust gas temperature is over 752°F (400°C)
|
| Threshold Value |
- Average of signal gradient is less than 1500mV/s (Response time 0.2s)
|
| Diagnostic Time |
- 3 valid fuel cut off phases
|
| MIL ON Condition |
|