DTC Information: DTC Detecting Condition
| Item |
Detecting Condition |
Possible Cause |
| Case 1 |
DTC Strategy |
|
- Poor connection
- Open or Short to ground in harness
- HO2S (S1/S2)
- ECM
- Exhaust leaks
|
| Enable Conditions |
- Battery voltage greater than 10.7V
- Lambda = 0.8 for 8s
|
| Threshold Value |
- Downstream O2S voltage less than 0.65V
|
| Case 2 |
DTC Strategy |
- Oscillation check: Test condition is checked at every 500s after oscillation check is performed
|
| Enable Conditions |
- Downstream O2S voltage less than 0.65 V for 100s
- Fuel system status = Closed loop
- Engine speed greater than 1120rpm and less than 3000rpm
- Engine load greater than 20% less than 83%
- Mass airflow greater than 20kg/h
- EGT around downstream O2S greater than 700°C (1292°F)
- O2S heater voltage greater than 9.2V
- Downstream O2S voltage greater than 0.5V and less than 0.4V
|
| Threshold Value |
- If All secondary conditions met then Fuel system open loop control Lambda = 0.8 for 8s
|
| Diagnostic Time |
|
| MIL ON Condition |
|
*S1: upstream oxygen sensor/S2: downstream oxygen sensor