| DTC Strategy |
- Check Lambda signal amplitude - slow response
|
- Poor connection
- Faulty HO2S
- Faulty ECM
|
| Enable Conditions |
- Upstream O2 sensor operative readiness is detected (Sensor tip temperature is greater than 680°C (1256°F) or heater maximum heating or normal heating for 30 seconds)
- O2 sensor Forced stimulation is active
- P0420 (Catalyst Diagnosis) monitoring is active
- P0133 diagnosis is synchronized with P0420 monitor
- Battery voltage is between 11V and 16V
|
| Threshold Value |
- Integral (Lambda signal amplitude measured/Lambda signal amplitude of a slow sensor) is greater than 1
|
| Diagnosis Time |
- 17 fuel trim controller cycles
|
| MIL On Condition |
|