| DTC Strategy |
- Sensor signal response time monitoring (lean to rich)
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- Poor connector connection
- Air leak in intake or exhaust system
- Faulty injector
- Faulty fuel pressure
- Faulty HO2S (B1/S2) circuit
- Faulty HO2S (B1/S2)
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| Enable Condition |
- Vehicle speed more than 12.43 MPH (20 km/h)
- Atmospheric pressure more than 75 kPa
- Temperature above 1328°F (720°C) of front oxygen sensor tip for more than 70 seconds of front oxygen sensor heating time
- Temperature above 1175°F (635°C) of rear oxygen sensor tip for more than 80 seconds of rear oxygen sensor heating time
- Difference between the lambda setting value and the actual value is less than 0.25
- Temperature above 122°F (50°C) of ECT
- Rear oxygen sensor voltage more than 0.6V
- Engine torque is between 10 to 20 Nm and 100 to 200 Nm (depending on engine speed)
- Catalyst model temperature 470 to 930°C (878 to 1706°F)
- Engine speed is between 832 and 3168 RPM
- Engine load s between 9 to 11% and 35 to 42%
- Driving condition
- Difference between the actual engine speed and the filtered engine speed is less than 320 RPM
- Difference between the actual intake air volume and the filtered intake air volume is less than 130 mg/stroke
- Difference between the actual lambda value and the filtered lambda value is less than 7%
- Intake air value is more than 8g
- Intake air value is more than 2g
- Lambda control activated
|
| Threshold Value |
- When the oxygen sensor voltage changes from lean to rich, it is more than 0.8 seconds
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| Diagnostic Time |
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| MIL ON Condition |
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