Heated Oxygen Sensor No. 1
- Start engine and allow it to reach normal operating temperature. Pull back seal at Heated Oxygen Sensor (HO2S) NO. 1 connector. Using DVOM, backprobe HO2S No. 1 connector between sensor signal and sensor ground terminals. See Fig 1
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Courtesy of SUZUKI OF AMERICA CORP.
- Increase engine speed to 2000 RPM and hold for about one minute while observing voltmeter. Reading should fluctuate between zero and one volt, without being constantly high or low. If voltage is not as specified, see DTC P0131-P0132 in appropriate SELF-DIAGNOSTICS article.