DTC P0133 Ho2S Circuit Slow Response (Bank 1 / Sensor 1): DTC Detecting Condition
DTC DETECTING CONDITION AND POSSIBLE CAUSE
| Item |
Detecting Condition |
Possible Cause |
| DTC Strategy |
- Slow response - Check lambda signal amplitude
|
- Leak in intake or exhaust system.
- Faulty fuel system
- Front and rear HO2S connections reversed.
- Contact resistance in connectors.
- HO2S contamination
|
| Enable Conditions |
- Sensor tip temp. > 650°C (1202°F)
- Forced stimulation active
- No lambda control limitation
- Canister saturation limited < 0.5
- 990 < Engine speed (RPM) < 3490
- Engine load : 240 < Mass air flow (mg/rev) < 800
- Coolant temperature > 74°C
- Vehicle speed > 4.82 km/h (3 mph)
- Ambient pressure > 700 hPa (525 mm Hg)
- Current engine speed - Mean of engine speed < 600 RPM
- Current mass air flow - Mean of mass air flow < 300 mg/rev
- Current lambda correction mean value - Mean of lambda correction mean value < 8%
- Downstream O2 sensor preheating finished
- No relevant failure
- 11V < Battery voltage < 16V
|
| Threshold Value |
- Integral (Lambda signal amplitude measured / Lambda signal amplitude of a slow sensor) > Thd.
|
| Diagnostic Time |
- 20 forced stimulation cycles
|
| Fail Safe |
- Reset lambda adaptation and fuel trim adaptation.
- Front HO2S heater is controlled in open loop control.
- EVAP. Emission control function is controlled in minimum operation mode
|
| Mil On Condition |
|