With NGS

Inspection
1. Connect the SST to the data link connector-2.




2. Select the PID/DATA MONITOR function of NGS.
3. Select "O2S1", "O2S2" on the NGS display. NGS measures and shows the voltage.




Specifications

4. If not as specified, inspect the following.
^ On-board diagnostic system
^ System inspection
Intake manifold vacuum.
Fuel line pressure.
5. If these systems are OK, replace the heated oxygen sensor.