| DTC Strategy |
- Manipulates Airfuel and stores the times it takes for the pre and post converter oxygen sensors to switch.
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- Catalyst Converter
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| Enable Conditions |
- Engine Runtime ≥ 580 sec.
- Purge Concentration Learned
- 3 g/s ≤ Airflow ≤ 10 g/s
- Throttle closed ≤ 1.5%
- 70°C (158°F) ≤ Coolant Temp. ≤ 120°C (248°F)
- -7°C (19.4°F) ≤ Ambient Temp. ≤ 105°C (221°F)
- Barometer ≥ 72 kPa
- Max number of test attempts ≤ 12
- Closed Loop
- 250°C (482°F) ≤ Catalyst Temp. ≤ 950°C (1742°F)
- Fuel learning completed
- Vehicle speed ≤ 3 kph (1.8 mph)
- Not airfuel ramping
- Max idle time (about 60 sec.) not exceeded
- No disabling faults present
- No instrumentation slows active
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| Threshold value |
- Oxygen Storage Time < 1.2 sec.
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| Diagnosis Time |
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| MIL On Condition |
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