Heated Oxygen Sensor No. 2
WARNING: This page is about a different car, the 2002 Suzuki XL-7, 2002 Suzuki Vitara, 2002 Suzuki Grand Vitara, 2002 Suzuki Esteem, and 2002 Suzuki Aerio. However, it is still accessible from the selected car via links, so may be relevant.
- Start engine and allow it to reach normal operating temperature. Pull back seal at Heated Oxygen Sensor (HO2S) NO. 2 connector. Using a voltmeter, backprobe HO2S No. 2 connector between sensor signal and sensor ground terminals. See Figure .
- Increase engine speed to 2000 RPM and hold for about one minute while observing voltmeter. Voltage readings should have slight fluctuations above and below .3 volts. If voltage is not as specified, see DTCs P0136 and P0420 in appropriate SELF-DIAGNOSTICS article.