DTC P0133: Notes
DTC P0133 [L3 WITH TC] DETECTION CONDITION AND POSSIBLE CAUSE
| DTC P0133 |
Front HO2S circuit slow response |
| DETECTION CONDITION |
- The PCM monitors the peak differential value of oxygen sensor signal after A/F fluctuation being provided when the following conditions are met. If the peak differential value is lower than the threshold value.
- The PCM determines that the front HO2S circuit is slow
MONITORING CONDITIONS
- - HO2S heater, HO2S, and TWC Repair Verification Drive Mode
- - Following conditions are met:
- Front HO2S heater monitor is completed.
- Fuel system loop status is closed loop fuel control.
- Engine speed: 1, 350-3, 500 rpm
- Charging efficiency: 21-71 %
(at engine speed: 2, 500 rpm)
- Intake air volume: 5-40 g/s
- Engine coolant temperature above 70°C {158°F}
Diagnostic support note
- This is an intermittent monitor (HO2S).
- The MIL illuminates if the PCM detects the above malfunction condition in two consecutive drive cycles or in one drive cycle while the DTC for the same malfunction has been stored in the PCM.
- DIAGNOSTIC MONITORING TEST RESULTS is available.
- PENDING CODE is available if the PCM detects the above malfunction condition during first drive cycle.
- FREEZE FRAME DATA is available.
- DTCs are stored in the PCM memory.
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| POSSIBLE CAUSE |
- Front HO2S deterioration
- Front HO2S malfunction
- Front HO2S looseness
- Fuel pressure sensor malfunction
- Clogged or restricted fuel line
- Fuel leakage in the fuel line between the fuel delivery pipe and the fuel pump
- Exhaust system leakage
- Purge solenoid valve malfunction
- Improper connection purge solenoid hose
- Insufficient compression
- Engine malfunction (Engine coolant leakage)
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