| DTC Strategy |
- Check HO2S Signal Amplitude
|
- Leak in intake or exhaust system
- Poor connection or damaged harness
- HO2S contamination
|
| Enable Conditions |
- Sensor pump current is valid.
- No Serial peripheral interface communication fault, P606
- Battery voltage is higher than 10V.
- Sensor tip temperature is higher than 650°C (1, 202°F).
- Catalyst diagnosis (P0420) activation condition
|
| Threshold Value |
- Integral (Lambda signal amplitude measured/Lambda signal amplitude of a slow sensor) is greater than 1.0.
|
| Diagnostic Time |
- 20 fuel trim controller cycles
|
| MIL On Condition |
|