| DTC Strategy |
- Check catalyst oxygen storage capacity
|
- Exhaust gas leaks
- Faulty rear HO2S
- Faulty catalyst converter
|
| Enable Condition |
- Engine coolant temperature is greater than 55.5°C (131.9°F)
- Catalyst temperature model is between 486.9°C (908.42°F) and 930°C (1706°F)
- Vehicle speed is faster than 20 km/h (12.5 mph)
- Engine RPM is between 992 and 3392 RPM
- MAF ranges from 0.36g/revolutions to 1.8g/revolutions.
- Barometric pressure (BARO) is greater than 75 kPa
- Canister load is lower than 0.65
- Fuel trim is active
- Lambda set-point is between 0.96 and 1.04
- Stable driving condition
- Difference absolute-value between engine RPM and filtered engine RPM is lower than 200 RPM
- Difference absolute-value between air mass and filtered air mass is lower than 0.45g/revolutions
- Difference absolute-value between lambda and filtered lambda is lower than 7%
- Downstream HO2S operative readiness is detected
- No opening/closing of canister purge valve
- Battery voltage is between 11V and 16V
|
| Threshold Value |
- Average malfunction index is greater than 1
|
| Diagnostic Time |
- 20 Fuel trim controller cycles
|
| MIL ON Condition |
|