Oxygen Sensor: Testing and Inspection

1998 Suzuki Esteem GLX Sedan Plus L4-1.6LSECTION Testing and Inspection




HEATED OXYGEN SENSOR (Sensor-1 and Sensor-2)

Oxygen Sensor Heater Inspection
1) Disconnect sensor coupler.





2) Using ohmmeter, measure resistance between terminals "VB" and "GND" of sensor coupler.

NOTE: Temperature of sensor affects resistance value largely. Make sure that sensor heater is at correct temperature.

Resistance of oxygen sensor heater: 11.7 - 15.6ohms at 20°C, 68°F.

If found faulty, replace oxygen sensor.
3) Connect sensor coupler securely.
RENDER: 1.0x

NO RELATED

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • You smell fuel, burning insulation, or see smoke.
  • Brakes feel soft, pull hard to one side, or make grinding noises.
  • The engine overheats, stalls repeatedly, or misfires under load.
  • You are missing required tools, torque specs, or safe lifting equipment.
  • You are not confident in the next step or safety outcome.