DTC P0133: Notes
DTC P0133 DETECTION CONDITION AND POSSIBLE CAUSES
| DTC P0133 |
Front HO2S circuit slow response |
| DETECTION CONDITION |
- An oxygen sensor malfunction can be detected by measuring the average frequency of the oxygen sensor signal, time required to pass from rich to lean, and the time required to pass from lean to rich.
- The average frequency of the oxygen sensor signal is more than the threshold value.
MONITORING CONDITIONS
- HO2S heater, HO2S, and TWC Repair Verification Drive Mode
- The following conditions are met:
- Front HO2S heater monitor is completed.
- ECT sensor and front HO2S heater are normal
- Engine speed: 1, 50-3, 00 RPM.
- Charging efficiency: 35-63%
(at engine speed of 2500 RPM
)
- Fuel system loop status is closed loop fuel control.
- 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.
|
| 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)
|