| DTC Strategy |
- Slow response(Switching time check at entry in fuel cut off)
|
- Leak in intake or exhaust system
- Faulty fuel system.
- Front and rear HO2S connections reversed.
- Contact resistance in connectors
- HO2S contamination
|
| Enable Condition |
- Coolant temp >74°C(165°F)
- (VLS_DOWN > 0.68V or < 0.21V) or Catalyst model temp > 500 °C
- 5km/h(3mph) < Vehicle speed < 180km/h(112mph)
- Sensor preheating and full phase finished
- Catalyst temp. model >350°C(662°F)
- No relevant failure
- 11V < Battery voltage < 16V
- Downstream O2 sensor signal at entry in fuel cut off > 0.55V
|
| Threshold Value |
- Average ratio(between measured and maximum allowed switching time at entry in fuel cut-off) > 1
|
| Diagnostic Time |
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