| DTC Strategy |
- Check catalyst oxygen storage capacity by evaluating downstream O2 sensor fluctuations
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- Poor Connector Connection
- Air leak in Exhaust System
- Faulty Downstream O2 Sensor
- Faulty Three-way Catalyst Converter
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| Enable Conditions |
- Engine Coolant Temp. (ECT) higher than 145.4°F (63°C)
- Catalyst Temp. model higher than 1022°F (550°C) and lower than 1706°F (930°C)
- Vehicle speed higher than 3 mph (4.83 km/h)
- Mass Air Flow more than 0.3 g/rev and less than 1.0g/rev
- Ambient pressure model more than 10 psi (0.7bar/75kPa)
- Canister load less than 0.5
- Lambda Control active and lambda set-point equal to 1
- Stable driving condition
- Absolute-value (Engine RPM-filtering RPM) is lower than 320 RPM
- Absolute-value (Air mass-filtering air mass) is lower than 0.16g/rev
- Absolute -value (Lambda-filtering Lambda) is lower than 7%
- Engine RPM is between 1300 RPM and 3000 RPM
- No opening/closing of canister purge valve
- Battery voltage higher than 11V and lower than 16V
- No relevant DTC present
|
| Threshold Value |
- Average malfunction index greater than 1
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| Diagnostic Time |
- 50 Lambda Controller Cycles
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| MIL On Condition |
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