DTC P0133:00 [MZR 1.8, MZR 2.0, MZR 2.5]

id0102f4702400

DTC P0133:00	A/F sensor circuit slow response
DETECTION CONDITION	•  A/F sensor malfunction is detected by measuring of the average frequency of A/F sensor signal, time required to pass from rich to lean, time required to pass from lean to rich. •  The average frequency of A/F sensor signal is more than the threshold value. MONITORING CONDITIONS ―  Drive Mode 03 (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: 1410—3500 rpm ―  Charging efficiency: 15—59 % (MTX), 20—59 % (ATX) ―  ECT: above 70 °C {158 °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.
POSSIBLE CAUSE	•  A/F sensor looseness •  Leakage exhaust system •  Purge solenoid valve malfunction ―  Improper connection purge solenoid hose •  Fuel supply system malfunction or improper fuel line pressure ―  Fuel leakage in fuel line between fuel distributor and fuel pump ―  Clogged or restricted in fuel filter (built-in fuel pump unit) ―  Pressure regulator malfunction (built-in fuel pump unit) ―  Fuel pump unit malfunction •  Engine malfunction ―  Engine coolant leakage ―  Insufficient engine compression •  A/F sensor malfunction ―  A/F sensor related wiring harness malfunction ―  A/F sensor deterioration •  PCM malfunction

Diagnostic procedure