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Home >> Mazda >> 2013 >> 2 Sport, 1.5L Eng VIN Y, Automatic Trans >> Repair and Diagnosis >> Engine Performance >> Engine Control Systems >> Engine Control System [MZR 1.5] >> Heated Oxygen Sensor (Ho2S) Inspection >> HO2S Inspection

HO2S Inspection

  1. Warm up the engine to normal operating temperature.
  2. Using the M-MDS, monitor the following:
    • Vehicle speed (PID: VSS)
    • Engine speed (PID: RPM)
    • HO2S voltage (PID: O2S12)
  3. Drive the vehicle and decelerate the engine speed by releasing the accelerator pedal fully when the engine speed is 3,000 rpm or more.
  4. Verify that the HO2S outputs a voltage of 0.6 V or more, one time or more, then verify that the HO2S voltage (PID: O2S12) is 0.3 V or less while decelerating as shown in the figure.
    Fig 1: Air Fuel Ratio (A/F) Sensor Vehicle Speed, Engine Speed And O2S12 Graph
    G09130340
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