DTC P2231 Ho2S Signal Circuit Shorted To Heater Circuit (Bank 1 / Sensor 1): DTC Detecting Condition
DTC DETECTING CONDITION AND POSSIBLE CAUSE
| Item |
Detecting Condition |
Possible Cause |
| DTC Strategy |
- Front HO2S signal monitoring.
|
- Contact resistance in connectors
- Interference in HO2S
|
| Enable Conditions |
- No lambda controller stop mode
- Exhaust temperature mode > 400°C (752°F)
- No relevant failure
- 11V < Battery voltage < 16V
- Amplitude of forced lambda stimulation < 0.05
- Period time of forced lambda stimulation < 2.55 sec.
- Stable driving condition as below
- Current engine speed - Mean of engine speed < 500 RPM
- Current mass air flow - Mean of mass air flow < 400 mg/rev
- Current lambda correction mean value - Mean of lambda correction mean value < 4%
|
| Threshold Value |
- More than 50 heater coupling detected during 100 cycles of heating frequency
|
| Diagnostic Time |
|
| Mil On Condition |
|