| DTC Strategy |
- Manipulates Airfuel and stores the times it takes for the pre and post converter oxygen sensors to switch.
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- Leakage in the exhaust system
- Faulty Catalyst Converter
- Faulty HO2S
- Faulty PCM
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| Enable Conditions |
- Engine runtime ≥ 580
- Purge Concentration Learned
- Airflow in range (3~10 g/s)
- Closed throttle
- Coolant temp in range
- Barometer above 72 Kpa
- Max number of test attempts not exceeded
- Closed loop fueling
- Catalyst temperature in range
- Fuel learning in range
- Vehicle speed below 3kph(2mph)
- Auto trans in gear
- Long term fuel correction learned at idle
- Airflow timer reached limit
- Max idle time not exceeded
- Max number tests not complete
- Disabling faults not present
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| Threshold value |
- Oxygen Storage Time < 2sec.
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| Diagnosis Time |
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| MIL On Condition |
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