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P2270: O2 Sensor Signal Stuck Lean (Bank 1 Sensor 2): DTC Detecting Condition
DTC DETECTING CONDITION CHART
| Item |
Detecting Condition |
Possible Cause |
| DTC Strategy |
- Plausibility check during shift of lambda setpoint to rich or lean
|
- Three Way Catalytic Converter (TWC)
- Air leakage in exhaust system
- Rear HO2S
|
| Enable Conditions |
- No fuel cut-off
- No full load phase
- No fuel trim error detected
- Delay time to start diagnosis: 13-30 sec., depending on operation point
- 11V < Battery voltage < 16V
- No relevant failure
|
| Threshold Value |
- Rear HO2S signal < 0.75V when lambda set point = 0.80
|
| Diagnostic Time |
|
| Mil On Condition |
|