DTC P0133:00: Notes
DTC P0133:00 (LF, L5) DETECTION CONDITION AND POSSIBLE CAUSE
| DTC P0133:00 |
A/F sensor circuit slow response |
| DETECTION CONDITION |
- The PCM monitors the A/F sensor terminal D current slow response and delayed response while the A/F fluctuation being provided when following monitoring conditions are met. If the average value of slow response and/or delayed response is more than specified value, the PCM determine that the A/F sensor has a deterioration.
MONITORING CONDITIONS
- Drive Mode 03 (EGR System, A/F sensor heater, HO2S heater, A/F sensor, HO2S and TWC Repair Verification Drive Mode)
- Following conditions are met:
- A/F sensor heater monitor is completed.
- Fuel system loop status is closed loop fuel control.
- ECT sensor and A/F sensor heater are normal
- Engine speed: 1,200-3,500 rpm
- Charging efficiency: 16-63%
- Intake airflow amount: 5-40 g/s {0.7-5.2 lb/min}
- Engine coolant temperature: above 60 °C {140 °F}
Diagnostic support note
- This is an intermittent monitor (A/F sensor, 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.
- PENDING CODE is available if the PCM detects the above malfunction condition during first drive cycle.
- FREEZE FRAME DATA (Mode 2)/Snapshot data is available.
- The DTC is stored in the PCM memory.
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| POSSIBLE CAUSE |
- A/F sensor malfunction
- Connector or terminals malfunction
- Leakage exhaust system
- Fuel supply system malfunction or improper fuel line pressure
- Fuel leakage in fuel line from fuel distribution pipe to fuel pump
- Clogged or restricted fuel filter
- Pressure regulator malfunction
- Fuel pump unit malfunction
- Purge solenoid valve malfunction
- Engine malfunction
- Leakage engine coolant
- Insufficient engine compression
- A/F sensor malfunction
- A/F sensor deterioration
- Related wiring harness malfunction
- PCM malfunction
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