Heated Oxygen Sensor (HO2S) Heater On-Vehicle Inspection

WARNING: This page is about a different car, the 2011 Suzuki SX4. However, it is still accessible from the selected car via links, so may be relevant.

Disconnect sensor connector.
Using ohmmeter, measure resistance of sensor heater between terminals "VB" and "GND" at sensor connector.
If found faulty, replace HO2S.

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

HO2S heater resistance

5.0 - 6.4 Ω at 20 °C (68 °F)

Fig 1: Identifying HO2S Heater
Courtesy of SUZUKI OF AMERICA CORP.
Connect sensor connector securely.