DTC P0133:00 [MZR 1.3, MZR 1.5]

id0102f8702400

DTC P0133:00	A/F sensor 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 A/F sensor circuit is slow. MONITORING CONDITIONS ―  Drive Mode 03 (A/F Sensor Heater, HO2S Heater, A/F Sensor, HO2S and TWC Repair Verification Drive Mode) ―  The following conditions are met: •  A/F sensor heater monitor is completed. •  Fuel system loop status is closed loop fuel control. ―  Engine speed: 1,500—3,500 rpm ―  Absolute load: 21—71 % (at engine speed: 2,500 rpm) ―  Intake air volume: 5—40 g/s {0.7—5.2 lb/min} ―  Engine coolant temperature: 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 •  Exhaust system leakage •  Purge system malfunction ―  Purge solenoid valve malfunction ―  Improper connection evaporative hose (purge solenoid valve side) •  Fuel supply system malfunction or insufficient fuel line pressure ―  Restricted fuel line ―  Fuel leakage in fuel line between fuel distributor and fuel pump ―  Pressure regulator malfunction (built-into fuel pump unit) ―  Fuel pump malfunction •  Engine internal malfunction ―  Engine coolant leakage ―  Insufficient engine compression •  A/F sensor malfunction •  PCM malfunction

Diagnostic procedure