| Main Action |
- Monitor HO2S signal (Downstream O2 sensor signal is too low)
|
- Poor Connection
- Faulty HO2S
- Clogging of fuel filter in fuel pump
- Faulty ECM
|
| Prerequisite Condition |
- Fuel cut-off control is not functioning.
- Full load is not active (Accelerator pedal value is lower than or equal to 90%).
- Catalyst overheating is not prevented.
- Battery voltage is between 11V and 16V.
|
| Threshold Value |
- Downstream O2 sensor voltage is lower than 0.75V when lambda set point equals to 0.8
|
| Diagnosis Time |
- 7 seconds after lambda set point shifts to corresponding side
|
| MIL On Condition |
|