Esteem L4-1590cc 1.6L SOHC 0 MFI 16V (1995)
Heated Oxygen Sensor (HO2S): Testing and 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 - 15.6 ohms at 20°C, 68°F
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If found faulty, replace oxygen sensor.
3. Connect sensor coupler securely.